Question

read the excerpt from sinners in the hands of an angry god.
you will know certainly that you must wear out long ages, millions of millions of ages, in wrestling and conflicting with this almighty merciless vengeance; and then when you have so done, when so many ages have actually been spent by you in this manner, you will know that all is but a point to what remains. so that your punishment will indeed be infinite. oh who can express what the state of a soul in such circumstances is!
edwards uses the phrase oh who can express what the state of a soul in such circumstances is! in order to
show what might happen if the reader disobeys edwards
describe what endless suffering looks and feels like.
illustrate that this type of suffering is unimaginable.
prove that very few people have survived limitless suffering

Explanation:

The phrase "Oh who can express what the state of a soul in such circumstances is!" emphasizes that the suffering described (infinite punishment) is beyond description. It's not about showing disobedience consequences (not about Edwards' personal authority), not a visual/feeling description (more about inexpressibility), and not about survival statistics. It's about the idea that this suffering is unimaginable as no one can express it.

Answer:

C. illustrate that this type of suffering is unimaginable.