(http://josecarilloforum.com/imgs/primer_answer-choice-test_image1-1A1.png) (http://josecarilloforum.com/imgs/primer_answer-choice-test_image2-1A1.png)
I am positive that in both instances, the graphics have incorrectly underlined the words indicating the incorrect answer choice. In the first instance, (A) "Can you" was wrongly indicated as the grammatically incorrect answer. In the second instance, (C) "as to" was likewise indicated as the grammatically incorrect answer.
From both the grammar and sentence structure standpoints, the only undoubtedly incorrect answer in that sentence is (B) "an information." The word "information" in an uncountable noun and as such does not require the article "an" to precede it.
Definitely not an incorrect answer is (A) "Can you" because it's perfectly vaid to use it along wit its variant "Could You. And neither could (C) "as to" be an incorrect answer either because it correctly means "regarding" or "about.