Answer:
b Dove aired a television campaign to reveal the effects of makeup.
Step-by-step explanation:
An informative writing is a form of writing that informs the readers about a certain topic. It does not contain or include any personal opinions or try to influence or persuade the readers.
Among the given sentences, sentence (b) is an informative writing for it presents an informational detail about the television campaign that reveals the effects of make-up. The other sentences contain opinions about the topic of their respective sentences, thus making them incorrect/ not informative writing.