Can someone explain what the question is asking exactly and provide a solution?

Question

Can someone explain what the question is asking exactly and provide a solution? I read it and it's confusing.

A woman puils on a 6.00-kg crate, which in turn is connected to a 41)() ke] (atain by a light rope. The light rope remains taut. If the two crates are accelerating to the right, which is greater: the force that the 6.00-kg crate exerts on the 4.00-kg crate, or the force that the 4.00-kg crate exerts on the 6.00-kg crate? 4.00 kg A. The force of the 6.00-kg crate on the 4.00-kg crate is greater. B. The force of the 4.00-kg crate on the 6.00-kg crate is greater. C. Both forces have the same magnitude D. The answer depends on the magnitude F of the pull E. The answer depends on the magnitude F of the pull and the strength of the friction force on each crate

Explanation / Answer

The question is about which is greater the force that 6kg crate exrts on 4kg or the force exerted by the 4kg block on 6kg crate. The answer is they exert same force on each other. By newtons law of action of force, the forces will be same in magnitude and opposite in direction.
As long as the string is taught,
(C) Both forces have the same magnitude

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