Which phrase should replace the phrase given in bold in the sentence to make it grammatically correct? If the sentence is correct as it is given, then mark No correction required as your answer.

We asked her that how she got time to write all these books.

A. that how did she got

B. that how she was getting

C. how did she get

D. how she got

Please do not use chat terms. Example: avoid using "grt" instead of "great".