Why are nylon ropes used in rock climbing?
a.
Nylon ropes are very stiff and therefore shorten the period of time over which a climber's fall is broken.
c.
There is no physical reason for the nylon material, it is just cheaper.
b.
Nylon ropes can easily stretch and therefore extends the period of time over which a climber's fall is broken.
d.
None of the above.