Given the task definition and input, reply with output. You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct option for the given question. Write down the answer index: 'A' or 'B'.

Sentence: A grocery bag experiences more resistance sliding across a store floor then across a house floor. Question: Which floor will force the grocery bag to move slower across it? (A) house floor (B) store floor

B