How does twain use hyperbole in this excerpt?

by and by one of our boys went away. he was not heard of for a long time. at last he turned up as apprentice engineer or "striker" on a steamboat. this thing shook the bottom out of all my sunday-school teachings. that boy had been notoriously worldly, and i just the reverse; yet he was exalted to this eminence, and i left in obscurity and misery.

a. to exaggerate twain's feelings about the role of religion in society
b. to show that the speaker is more worldly than he seems to be
c. to link two unlike concepts: the steamboat and sunday school
d. to overstate the difference between twain and the other boy