According to the passage, what is the main task of "executive coaching"？A．Teaching executi

According to the passage, what is the main task of "executive coaching"？

A．Teaching executives skills they have not before.

B．Assisting executives to run their businesses.

C．Making a series of rules for executives to manage their subordinates.

D．Improving the team work of staff in the executives" organizations.

请帮忙给出正确答案和分析，谢谢！