In this task, you are given a question containing a blank (_) and two options. You should pick the best option to answer the question. Please answer with "A" or "B".

Joey was careful when he passed by the tack but he managed to scratch himself on the nail because the _ was sharp. (A) tack (B) nail
B

The man worked for hours to clean the carpet with his vacuum, but the _ didn't work. (A) carpet (B) vacuum
B

It took another hour for Rebecca to fill the tank with water as compared with Jennifer because _ worked very quickly. (A) Rebecca (B) Jennifer

B