It's definitely not B or C. There are things missing from A and D so we can't narrow it down any farther.
Answer:
1 millions times stronger
Answer:
So the conclusion is that in presence of air net force acting downward reduces for feather and hence falls slower than coin. But in absence of air resistance, net downward force is just equal to force due to gravity which is same for both coin and feather and hence they fall down at the same rate.
The answer is B.) hope this helps
