So, I'm working through Moshmans book on HU play and on page 27 I found the following hand:

Effective Stakcs: $800
Blinds $15-$30

My Hand: 64s

Villain, a loose and over-aggressive player raises to $90 on the button, and you make a loose call. The pot is $180.

Flop: 852r

You have flopped a strong draw. Is it better to bet out or go for a check-raise? (I assume you have rejected the third alternative of check calling.)

Now, I realise that donking is probably bad, but why is c/c even worse? To be honest, I would have check/called err day if villain didn't overbet or something odd like that.

Thanks a lot in advance.