单选题：Questions are based on the following passage. "Lifelong lear

Questions are based on the following passage.
"Lifelong learning" is a phrase beloved by business schools．But not, it seems, by their clients．According to a recent survey by Mannaz, a management-development firm, the number of professionalstaking part in formal corporate training drops rapidly after the age of 55．Are these wise, old headsbeing overlooked?
It is tempting to conclude that older executives are falling victim to age discrimination, as firmsfocus resources on younger talent．But Jorgen Thorsell, Mannaz's vice-president, attributes this to theemployees themselves instead of to the organizations.
This doesn't mean that more seasoned executives have completely abandoned the idea of personaland career development, however．Instead, Mr．Thorsell says that this group prefers a do-it-yourselfapproach, conducting their own research and swapping war stories with their peers rather than take aplace at business school.
This self-taught approach carries two potential dangers．The first is that a wealth of knowledge andexperience is lost from the classroom, which reduces the value of the training for everyone else．Butnon-participation may also be the beginning of a process of detachment from the organization, its almsand aspirations, which in time will damage both parties．Furthermore, Stephen Burnett, associate deanof a management school close to Chicago, says that as executives start to stretch their careers into theirseventies, education makes even more sense for this group.
One solution is to throw money at the problem．When senior managers are offered the chance to mixwith their peers at a top business school, they seem to be quickly won over．IMD in Switzerland, forexample, maintains that it does not see any drop in the number of older managers on its programs, and goeson to say that it has actually witnessed organizations investing heavily in them throughout the downturn.
Few organizations could afford to put all of their veteran managers through the sort of prestigiousprograms that IMD offers．But firms do need to engage those managers below the C-suite-whom onemanagement consultant describes as the "magnificent middle"--because these are the front-liners whomake things happen within any business and who carry around in their heads the secrets of how theorganization works.
One way in which this can be done is to make training less about abstract theory and more aboutthe actual workplace．This means steering clear of the ease studies that business schools are so fond ofand instead relating new ideas directly to what is happening on a day-to-day basis within theorganization．To accomplish this, training should be delivered in short, sharp bursts so that executivescan take a lesson, put it into practice, assess its effectiveness and then return to shape it further in lightof this "trial by fire".
According to Mr．Thorsell, why are older professionals getting less formal corporate training? A．Because firms pay more attention to training younger talents.
B．Because older professionals have given up career development.
C．Because experienced professionals like another way of training.
D．Because older talents prefer informal corporate training.