B.
The increase in area or space will result in the crabs being spread out and they will not uncover each other's eggs accidently and thus the number of birds would reduce and consequently the number of tourists. This is the whole point of the birdwatcher's argument. However, if the density of carbs is high, then that coupled with an increase in area would lead to more eggs being uncovered and thus, more birds and tourist. This is exactly what B implies.
The increase in area or space will result in the crabs being spread out and they will not uncover each other's eggs accidently and thus the number of birds would reduce and consequently the number of tourists. This is the whole point of the birdwatcher's argument. However, if the density of carbs is high, then that coupled with an increase in area would lead to more eggs being uncovered and thus, more birds and tourist. This is exactly what B implies.
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