I believe c is the right answer.
If your in a city, go inside a building immediately. most buildings have lightening rod, so the lightening voltage won't hit on you.
if you're in an open area, don't go under a tree, or it'll hit you and the tree, even if it doesn't hit you, you still cannot take the impact by the exploding tree. leave the water or metal bicycle or stuff that conducts electricity.
The naturally acidic rainwater will erode the limestone mountin over time
Answer:
I got 3/8, hope this helps.
Explanation: