(Choose 1 answer)
A young pair of rabbits (one of each sex) is placed on an island. A pair of rabbits does not breed until they are 2 month old. After they are 2 month old they will produce 2 pairs of rabbits each month. Find the number of pairs of rabbits after 6 months.
A. 21
B. 11
C. 34
D. 57
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