@perennialloner,
perennialloner wrote:
d says the child will be progressively rewarded according to the extent that/to which the behaviors are fulfilled.
I just want to know which option, in this scenario, is better.
I already gave you my answer to this, I thought. "To which" seems more appropriate, since "extent" is the referent.
But, really, I guess either is OK, when I think about it. I just have trouble making sense out of that particular formulation, which seems awkward, at best, to me.
I would, for example, say: To the extent that he lied, he is unreliable (not "to which").
I might also say something like: He got an "F," but he worked hard, which is about the extent of anything positive I can glean from the situation.