You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.
--------
Question: They had a feeling either the bookcase or the clock would fall first. The _ was unstable.

Answer: clock


Question: When deciding between using the treadmill or the yoga mat for their exercise routine, Alex chose the _ because it was easy.

Answer: yoga mat


Question: I've always wanted to write a book a mystery or crime book. The _ book would be based on my lost uncle.

Answer:
mystery