Deboard the mountain for the next hour and silently swear under my breath as I start to feel my knees and ankles give out under the weight of my pack . Continue to silently swear as the very last obstacle to the car is a stream that I can not jump . Remove shoes , remove socks , roll up pants . Cross .

Question with options to choose from: Why is the narrator restricted from moving ?
Choices:
I. Their car broke down ..
II. They do n't have shoes ..
III. The water is too much ..
IV. They lost their shoes ..
III.