Answer:
D
Explanation:
I just had this question the answer is D
Gravity ALWAYS does that, and electrostatic force does it when two objects have opposite charges.
The answer is C! I knew this way before taking the test
This question would be a piece o' cake, except that we don't know your observations, your data, or your conclusions.
We also don't know the first method, the second method, the accuracy of either method, the displacement method, or what you found out from this investigation.
Otherwise, like I said, this is really no problem.