I mean this really depends on frequencies.

If we always c/c our hands with SD value, then its hard for us to bluff. Floating OOP, hoping for a turn check through so we can bluff river is kind of difficult and prob not a good play.

If we pick A, at least we can shove flop with our hands/bluffs and draws. Choosing B, if he's good at picking up on reads/patterns, he might recognize that our flop c/r are primarily draws/bluffs as opposed to real hands.

Also its probably important to know: How tight he's folding to c/r on flops (to bluff more) or how light he's calling c/r on flops (to value bet wider)