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".

[Q]: 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
[A]: B


[Q]: James was looking if there is any space to put the book into the shelf. The _ is small. (A) space (B) book
[A]: A


[Q]: Paula is so introverted she joins an online group rather than an in-person club, because the _ seems comfortable. (A) club (B) group
[A]:
B