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, should

B would, must

C could be, ought

D could be,must

Solution

Correct Answer: Option D