Eighty-one pocket gophers were present in Maddox Field at the start of 2006. During that year, 24 individuals were born, and 19 died. Twelve individuals immigrated, and 10 emigrated. How many pocket gophers were present in Maddox Field at the start of 2007?
A) 76
B) 81
C) 86
D) 88
E) 146
Correct Answer:
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