单选题 His work shed provocative yet necessary light, on an important way to slow the spread of this deadly virus.
【正确答案】 D
【答案解析】provocative挑衅的,煽动的。四个选项:disturbing干扰的,骚扰的;provisional临时的;seductive诱人的,有魅力的;insulting侮辱的,污蔑的。