During the age of exploration, there were no major risks associated with exploration.
true
false

According to studies this is False.

There weren't any risks to exploring.         FALSE

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

Brand c i think that should be it