Lighting is the static electricity stored in the clouds that is disposed to the earth.
The answer is A. Force is equal to mass x acceleration. The acceleration due to gravity is a constant so multiplying the mass by 2 would double the force.
Assuming that the angle is the same for both ropes, then D. is the answer. You have to consider also if the ropes are close together or far apart and if the force to move the object is in line with the ropes or perpendicular to them.
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I believe this is right but double check to make sure :)
B- the acceleration is greater for the more massive rock
