To estimate the size of the grizzly bear population in a national park, rangers tagged and released 12 grizzly bears into the park. A few months later, 2 out of 21 grizzly bears sighted were tagged. Assuming the population of tagged bears in the population, estimate the number of grizzly bears in the population of this national park. a. 24 grizzly bears
b. 126 grizzly bears
c. 252 grizzly bears
d. 22 grizzly bears