The black teacher set a good example _____ all the rest of the group, ____  all peace-loving people.

A．for; who are

B．for; which was

C．to ; which are

D．to; who are

在没有世界贸易组织严格界定条件所列的例外情况下，一成员国不得歧视来自其他成员国的产品和提供者；同时，一成员国不得对合法入境的外国产品运用低于本国产品的歧视性待遇，这是“无歧视原则”的含义。( )