Hey, how's your day going.
Your answer is (should be, but I haven't done the test) A,
rock samples from the moon.
The reason why we like to test "moon rocks" is because they are undisturbed for millions of years. Were as on earth we have lots of things that could mess up our dating (wind, water, animals, geological processes, etc.) That is why you can't tell the age of the solar system from your cack yard rocks.
(My reasoning ^, not the internets!)