Yes it is.

Consider makes to be ambiguous.

Regarding to, yes that's makes the statement very parallel. to do x and to do Y.

Consider X,Y (X, Y ---> NOUN) and Consider X to be Y both are correct idioms

But, Consider As ---> incorrect Idiom

B/w Op A and Op E, Op E is correct because of the presence of the word "TO" after AND, this word makes the sentence parallel...see

Elise Richards was one of the first musicians to consider slavery a legitimate subject for music and to portray its horrific status in the society.

I hope u get the ans of your query now !!!

Great answer, Atul - and one quick thing to add:

The presence of the verb "to be" in answer choice A provides a pretty good clue, at least to me, that we'll need to be careful about parallelism here. Like you said, "consider X to be Y" is an okay idiom, but then in that sentence you'd have:

...one of the first musicians TO CONSIDER slavery TO BE a legit subject and TO PORTRAY its status.

There are three infinitive "to X" verbs in there so it's unclear whether the third one is parallel to and belongs to "musicians" or to "slavery". We need a construction that makes it perfectly clear and logical that musicians are the ones portraying.

...one of the first musicians TO CONSIDER slavery TO BE a legit subject and TO PORTRAY its status.

There are three infinitive "to X" verbs in there so it's unclear whether the third one is parallel to and belongs to "musicians" or to "slavery". We need a construction that makes it perfectly clear and logical that musicians are the ones portraying.

Hi Brian,

This is a great point. I didn't notice this error. Thanks for spotting this error, really a good catch. I wish, if some miracle happen and i will be able to think (at least 10%) like you think on my test day.

Thanks