You should use a correlative conjunction here.
Both . . . and
Either . . . or
Neither . . . nor
Not only . . . but also
Answer: There was a high risk of avalanche along the Chilkoot Pass, as snow storms were frequent and the snow could give way and speed down the summit. The wet and heavy snow of the avalanches could kill 50 to 100 men at a time.
Explanation:
This would be "Rising Action." Most problems happen here.
Think of it in movies. Your ACTION is because of a CONFLICT two characters are having.
B?
I’m not completely sure though