It’s a hyperbole because it is an over exaggeration
<span>B. We were walking by the lake when we heard a siren.
C. By the time I graduated, I had attended three different high schools.
D. Though he had been rude at first, Rupert eventually won over the congregation
These three sentences are all correct, because even if the verb tense shifts it still makes sense within the context of the situation.</span>
The answer is C. <span>Prospero has promised to set Ariel free if the good spirit does what Prospero says.</span>