The answer would be an Oxymoron.
Answer:
Elaborate on how two mostly unlike things are alike.
Explanation:
An extended metaphor is the use of metaphor to compare two dissimilar things throughout a poem or story.
Therefore, what a poem must do to develop an extended metaphor is to elaborate on how two mostly unlike things are alike by using comparisons.
The answer for your question is b. The other answers have errors
Space is satisfactory aparment meets expected hygiene standards apartment is affordable also aparment fairly recent not old