The speaker means that B. <span>Even when they were tired and had doubts, they remained faithful.
The "voices singing in [their] ears" were themselves, thinking of the doubts they have. </span>
<span>C. Is the correct answer here - bought is based on the root verb 'buy or to buy' but its sense in the sentence is set against the framework of a time from the phrase with the word 'During' and so the word of choice must become 'bought'.</span>
Answer: “We can be sure that many American taxpayers of the future will be asking ‘what good is it?’"
ANSWER: C. It was so hot, it felt like an oven outside
EXPLANATION: This example uses hyperbole, a technique where exaggeration is used to create a strong effect.