Refer to the Mark-Recapture Equation Below

Refer to the mark-recapture equation below. In an effort to measure the size of a bluegill population in a pond, you capture 40 bluegills, mark each with a tag on the tail fin, and then release them.A week later you return to the pond and catch 40 more bluegills, eight of which have tags on the tail fin.In the equation, n₁ is the total number of individuals in the first sample (captured, marked, and released) ; n₂ is the total number of individuals in the second sample; and M is the number of marked individuals recaptured in second sample.Which is the best estimate of the overall size of this bluegill population?

A) 100
B) 160
C) 200
D) 320
E) 400