A. the moon's gravitational pull on earth causes water to bulge on two sides of the earth
C & B are switched so I'm not sure if that was a typo or not, but the answer is concentration!
Answer: an invisible line around which an object rotates, or spins.
Explanation: //Give thanks(and or Brainliest) if helpful (≧▽≦)//
It was due to the metal foil in which the alpha particles can't even pass through. This experiment conducted by Rutherford led to the discovery of protons.
