Please answer the following question by reasoning step-by-step.
Which of the following two sentences does not make sense?\nOptions:\n- Sentence A: "the soldier wears a down jacket to protect himself from a bullet"\n- Sentence B: "the soldier wears a body armor to protect himself from a bullet"\n

Sentence A
Down jackets are designed to keep the wearer warm.

.

Thus, the answer is Sentence A