C/R is much to small. You are out of position and if I'm ahead of you in position I'm calling you here w/ a pair, just to see what you do on the turn and if I can steal it from you on the turn. I might even reraise you here. This is the kind of hand I like to be aggressive in, because there is a strong chance you don't have it and because if you do, I will find out pretty fast.

C/R bluff is not a terrible idea, but you can't give me those kinds of odds to stick around or leave the pot size small enough that I'm comfortable taking another shot at it to see how serious you are.