The dashes should be inserted between "bridge" and "an", and the second dash should be between "gorge" and "while".
Without the hyphens, the sentence is a bit too long and over-connected. There needs to be some sort of pause to describe the bridge the jumper is jumping off of.
:)
The use of irony with a serious topic.
I believe it's A. but this is the first time I've seen someone use harrisburg in a question and I was happy