Why did mark twain say "No, the romance and beauty were all gone from the river. All the value any feature of it had for me now was the amount of usefulness it could furnish toward compassing the safe piloting of a steamboat." Which statement BEST explains why the author no longer found romance or beauty in the river?

A
He was busy piloting the steamboat.
B
He had become too familiar with the river.

C
He no longer liked his job working on the river.

D
He couldn't see the river while driving the steamboat.