问题详情

After one CD is published, fans often have to wait for years before another one comes into the world because ______.
A．the costs of promotion and production are high, so musicians publish their works in groups
B．musicians have to compose enough works before they release them
C．the promotion and production work takes too much of musician"s time
D．musicians want to attract listeners to buy more请帮忙给出正确答案和分析，谢谢！