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
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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: While the man modified the height of the bike, the boy rode the tricycle, because the _ was the correct height. (A) bike (B) tricycle

A:
B
****