题目内容：
根据材料，回答问题A
1．Driver Wanted
(1)Clean driving license．
(2)Must be of smart appearance．
(3)Aged over 25．
Apply to：Capes Taxis，17 Palace Road，Boston．
2．Air Hostesses for International Flights Wanted
(1)Applicants must be between 20 and 33 years old．
(2)Height 1．6m to 1．75m．
(3)Education to GCSE standard．
(4)Two languages．Must be able to swim-
Apply to：Recruitment office,Southern Airline，Heathrow Airpott West.
3．Teacher Needed
For private language school．Teaching experience unnecessary.
Apply to：The Director of Studies，Instant Language Ltd，279 Canal Street，Boston.
What prevents Jack，an experienced taxi driver，working for Capes Taxis? A．Fond of beer and wine．
B．Punished for speeding and wrong parking．
C．Unable to speak a foreign language．
D．Not having college education．
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答案解析：