Which two organisms are most closely related?

AQuiscalus mexicanus and Carpodacus mexicanus
BSylvilagus floridanus and Sylvilagus palustris
CProcyon lotor and Zapus hudsonius
DEnhydra lutris and Martes pennanti

Verified Answer :

The answer is B.

The most closely related organisms will have the same genus, which is the first part of an organism's name. Since both organisms in option B start with Sylvilagus, they are most closely related.