C. me in sentence 3
The correct version of the sentence:
(3) Sandy was more talkative than I.
The right answer is corrupt because you're looking for a synonym of ignoble.
I would say that a "Scientific article describing the negative effect of school uniforms" would be your best bet because the article contains factual information about how wearing school uniforms deteriorates a child's creativity ( and whatever the article said)!
I hope that this helped. : )