The correct answer to this question can only be:
A. driveways where cars are parked
That is because a two point turn involves driving on reverse in an area that already has little to no space. If cars are around, it might become very likely that it is going to be a complicated maneuver and you should avoid as much as possible risking hitting on anything by choosing an area with so little space.
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B. driveways where traffic signs have been posted by the owner
This really doesn't affect the two-point turn. So B is wrong.
C. driveways you can only exit by backing up
When you can only exist by backing up, but there's a side way, it's usually when you perform the two-point turn, so it can't be C either.
