单选题：根据下面资料，回答题 Effective teamwork is key to the success of a bus

根据下面资料，回答题
Effective teamwork is key to the success of a business． Teamwork helps tasks get completed quickly and efficiently(高效地)． However , poor teamwork can hinder a business success and make operations much more difficult． Four parts of teamwork can make it effective and lead to business success．
Without effective communication, a team will be weak． When a team has open and honest communication , a lot more will be achieved．Communication makes sure that everyone listens to one another's ideas and will help them express their thoughts and feelings． Good communication also helps put together a clear plan of action．
The way the team is made up of plays a major role in how well the group works as a team．It is necessary that people with different skills be paired together so that they can make use of one another's knowledge and skills． For example , in a team , there should be a few people who are good at planning，one or two key leaders and several experts in various subjects．
Leadership is important in a team． A leader is needed to settle disagreements , set goals and keep the team on track． A good leader can lead without being bossy , achieve goals by encouraging the team and stepping in when necessary , and make suggestions for improvements．
A team without passion will get nowhere． If any member of the team does not have the passion to get the job done and do it well, he or she will become less and less interested in the duties and bring the rest of the team down．
Efficient teamwork can help a business to ． A．complete tasks quickly
A．complete tasks quickly
B．make operations difficult
B．make operations difficult
C．improve communication gradually
C．improve communication gradually
D．achieve leadership faster
D．achieve leadership faster