Charlotte knew ___________ the secret investigation _________ her past, but she closed her eyes to it and pretended it wasn't happening.

Choose the series of prepositions that best completes the following sentence.

Charlotte knew ___________ the secret investigation _________ her past, but she closed her eyes to it and pretended it wasn't happening.

A. of, about
B. on, of
C. about, to
D. of, after

Answer - A