Abena tells her partner Alex that she's going to run to the store for some bread. Alex asks why Abena doesn't just take the car. This misunderstanding was due to a(n) fallacy.

The correct answer is letter "B": equivocation.

Explanation:

Fallacies are false statements that lead to mistaken conclusions. There is a vast number of fallacies such as the accent fallacy, the accident fallacy, or the equivocation fallacy. The equivocation fallacy is used when a term of a sentence is given but might mean more than one (1) thing, thus, the argument becomes misleading.  In the example:

"...going to run to the store for some bread";

is interpreted as if literally Alex will run to go to the store while he might have meant only to go as fast as possible to the store.

answer; test-retest;

answer; planning;