Question

Ones self

Answer 1

i believed tht its C but than again there is B which is invalid

Answer 2

So what kind of bad behavior is it?

Is genuine behavior bad? No, throw that out.
Is invalid behavior bad? I guess, but maybe there's a better choice.
Is infantile behavior bad? Usually.
Is youthful behavior bad? Sometimes, but the word isn't usually as strongly negative.

So yes, I agree. It's C.

Answer 3

yelp yelp

Answer 4

I've got to go. Sorry!