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.

Q: Tom needed to decide if he wanted to use a homemade remover or commercial remover to remove the wallpaper, the _ version was harmful for the environment.

A: commercial
****
Q: She needed an adhesive like glue or tape for her project, but the _ was missing.

A: glue
****
Q: David wanted to sell his apartment and buy a house, because the _ is bigger.

A:
house
****