The following sentence has been split into four segments. Identify the segment that contains an inappropriately used preposition.

The hiker stumbled upon a beautiful waterfall / at the end of the trail / and marvelled on its majestic beauty / for several minutes.

A

The hiker stumbled upon a beautiful waterfall

B

at the end of the trail

C

and marvelled on its majestic beauty

D

for several minutes