What is the name of the common error in the following sentence?

having risen because of the rains, the hikers were unable to cross the river.

a. dangling modifier
b. infinitive phrase
c. prepositional phrase
d. run-on sentence

i think it would be c. or a. i recommend a if it's not a than it's c if it's not c than it's b your welcome : ) sorry if you get it wrong

judy jones is an attractive woman who receives attention from many men throughout the story.   despite her beautiful appearance, she is superficial and callous.   she is an aggressive woman who goes after any man she desires but she is not happy.   she is fickle and is never satisfied.   her beauty is only skin deep.   dexter breaks down because he knows his dreams are unattainable.   he believes that wealth and physical beauty are what will make him happy.   he soon realizes that she has lost her attractive looks.   it is not all what he had planned.