Answer:
Can't be heard
Explanation:
The prefix in- means not, and "audible" basically means hearable. Put them together and you get not hearable, or can't be heard!
I believe it may be either C or D, i'd go with C, tell me if you get it correct or not, sorry if you don't
I would say that this is true, because an autobiography would be considered more of a descriptive text than a persuasive text.