The main idea is about different devices or platforms either knowingly or unknowingly forcing the identity that u are know by in everyday life on u all the time despite the fact that, the identity of a person might differ from place to place and mental state to mental state and some people see and feel this and feel limited by it.
Subordinate clause this is the answer its just making me type more to post this as my answer
C, because through out the story it reflects back on him being in disguise and how else would she let him in let alone a stranger