According to the speaker, what do people often think about astronomers a. They spend most of their time looking through telescopes. b. They are constantly analyzing data. c. They often live near observatories. d. They devote a lot of time to theoretical problems.

差异化带来的利益有哪两种（）

A.对供给者或生产者、消费者带来利益

B.给生产商、代理商带来利益

C.给企业家、创业者带来利益

D.给政府、群众带来利益