The answer to this question is C - the common error in this sentence is a
dangling modifier. The dangling modifier included here, would be the
words 'having risen'. It Is unclear in this sentence whether this phrase
is referring to the hikers, or the river. The hikers could have been
woken up early because of the rains, until we reach the end of the
sentence that concerns a river that also could have risen due to the
rains.
Im pretty sure its verses are repeated but with slight variations
The passage saying the earth is round is Isaiah 40:22:
He sits enthroned above the circle of the earth, and its people are like grasshoppers. He stretches out the heavens like a canopy, and spreads them out like a tent to live in.