. Hiking the trail to the peak------ be dangerous if you are not well prepared for dramatic weather changes.You--------research the route a little more before you attempt the ascent.

. Hiking the trail to the peak------ be dangerous if you are not well prepared for dramatic weather changes.You--------research the route a little more before you attempt the ascent.

A can

B ought

C could be,must

D can

Solution

Correct Answer: Option C