1.  I need not offer any explanation regarding this incident - my behaviour is speaking itself.

A. will speak to itself
B. speaks for itself
C. has been speaking
D. speaks about itself
E. No correction required

Answer: Option B

Explanation:

The sentence is simple present, so never use any option that is related to past, future / even present continuous. "speaks for iself" is simple present and the right option than "speak about itself".