Question

Which sentence has an error in it?

The actions of the criminal were documented in
several documents displayed in the courtroom,
Karen's advocacy group advocated for students who
struggle to get enough food on a daily basis.
Phil was disappointed when he was stationed at the
Missouri station rather than the one in Hawaii,
D)
The violent nature of Neil Gaiman's graph novel
caused parents to protest its inclusion on the
syllabus,

Answer 1

Sentence 1 has a repeating word, documented and documents, but that's not really an error.

Sentence 3 should have a comma after Missouri station; "Phil was disappointed when he was stationed at the Missouri station, rather than the one in Hawaii"

Sentence 4: not really anything wrong with it, but shouldn't it be graphic novel?