问题详情

Why do some publishers no longer promote their books？

A．Because the paper books are not profitable enough to sustain promotion.

B．Because Amazon"s near monopoly over the industry makes promotion unnecessary.

C．Because the public have easy access to the books" sales and reviews.

D．Because all the writers are promoting the books on their own.

请帮忙给出正确答案和分析，谢谢！