PLEASE ASAP ILL GIVE BRAINLIEST.

second option is the answer

Step-by-step explanation:

Fot every action,there is an equal and opposite reaction

Since we need to make sure that 4 and 3 are multiplied by the same amount and they answer would need to be 9 numbers apart. We can figure out that they would both be multiplied by 9 and Mark would get 36 and Brian would get 27. So that means that Paul would get 9.

The answer is 9.