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]: The librarian wanted to hide the book on the shelf but the _ was too large. (A) book (B) shelf
[A]: A


[Q]: The nails that I bought to construct the desks did not work, because the _ were too strong. (A) nails (B) desks
[A]: B


[Q]: We needed a longer ladder to reach the top of the box because the _ was too high. (A) ladder (B) box
[A]:
B