Read the sentence to find out if there is any error in it. The error, if any, will be in one part of the sentence. The number of that part will be the answer. If there is no error, then the answer is (E). Ignore errors of punctuation if any.

Sarah is keening (A)/ on learning as many languages (B)/ as possible before she (C)/ goes abroad for studies. (D)/ No Error (E)