I'll give you a question, please answer with step-by-step reasoning process.
Of the below sentences, which one does *not* make sense?\nOptions:\n- Sentence A: "The kid is walking with a brisk pace, and his grandpa can hardly keep up with him."\n- Sentence B: "The kid is walking with a brisk pace, and his grandpa can easily keep up with him."\n

Sentence B
Grandpa is older and moves slowly, so it is difficult to walk very fast.

.

The answer: Sentence B