Answer: B) the coaches like waiting until the stands are full.
Explanation: parallelism or parallel structure is a literary device that consists in the repetition of the grammatical structure of different words or phrases in a sentence or paragraph, in order to emphasize an idea or to create an impact in the audience. From the given options, the phrase that mantains the parallel structure is option B, because it uses the same verb tense (like + verb +ing).
