Buying time with limited agreement is a useful strategy when you:

Question

have too much work to do.
cannot think of anything to say.
want to avoid escalating a conflict but do not agree with the other person.
know that the presenting problem is not the real problem but do not know what the real problem is.

Answer 1

I chose B, but I am rally leanning toward C.

Answer 2

I think C is the best answer.

Answer 3

I would also agree with C.