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>
I taught my students how to divide decimal numbers today.
If he had known that it would've hurt, he wouldn't have said it.
The man had dug a hole earlier for his plant he wanted to grow.
Oedipus sends Creon to find the answer of ending Thebes' plague.