Which one is right?

A: Balancing on a two-and-a-quarter-inch wire, she crossed just north of the lower suspension bridge.

B: Balancing on a two-and-a-quarter-inch wire, just north of the lower suspension bridge is where her crossings took place.

C: Balancing on a two-and-a-quarter-inch wire, her crossings took place just north of the lower suspension bridge.

D: Balancing on a two-and-a-quarter-inch wire, and crossing just north of the lower suspension bridge.