Answer:
The answer is C. Pollution
Well if the boat initially at rest accelerates at uniformly at 4.0 m/s (squared) then it would be best to muitlply it so 4.0 squared equals 2 by multiplying that by 7.0 your answer would be 14 s
We will have the following:

So, the force is approximately 1.85*10^-6 N.
Carbon isn’t because all the others on the list are naturally made apart from carbon which is man made because of all the pollution . X