Linear inequalities in one or two variables SAT question

Choice B is correct. It's given that the model estimates that whales from the genus Eschrichtius travel $72$ to $77$ miles in the ocean each day during their migration. If one of these whales travels $72$ miles each day for $16$ days, then the whale travels $72(16)$ miles total. If one of these whales travels $77$ miles each day for $16$ days, then the whale travels $77(16)$ miles total. Therefore, the model estimates that in $16$ days of its migration, a whale from the genus Eschrichtius could travel at least $72(16)$ and at most $77(16)$ miles total. Thus, the inequality $(72)(16)\le x\le (77)(16)$ represents the estimated total number of miles, $x$, a whale from the genus Eschrichtius could travel in $16$ days of its migration.

Choice A is incorrect and may result from conceptual errors.

Choice C is incorrect and may result from conceptual errors.

Choice D is incorrect and may result from conceptual errors.