Which of the Following Arguments Commits the Fallacy of Appeal

Which of the following arguments commits the fallacy of appeal to ignorance?

A) Since Cindy got the wrong answer, she must not know how to do calculus.
B) I know that all of my ancestry is Korean, so I do not have any Angolan blood.
C) Eve should be a dancer, because she doesn't know how to sing.
D) Tom shouldn't be trusted to make the cake, since he has demonstrated that he doesn't know what he's doing in the kitchen.
E) We can't verify Marvin's alibi for the night of the murder, so he is a suspect.