According to Experimental Evidence,Drosophila Exposed to Higher Than Normal Oxygen

According to experimental evidence,Drosophila exposed to higher than normal oxygen concentrations increase their body mass by about 2 percent each generation.Suppose that the concentration of oxygen were to increase again,but this time the average size increase is only 0.1 percent (0.001) per generation.Suppose that these flies have five generations per year,and their average body mass is now 1 mg.How large would the flies be after 1,000 years? [Use the formula W = S(1 + R) N,where W is the final mass,S is the starting mass,R is the rate of increase (0.001) ,and N is the number of generations.]

A) 2.1 mg
B) 2.7 mg
C) 5.0 mg
D) 38 mg
E) 148 mg