The answer is "decreased". Theoretically speaking this is called decompression melting, It is the reduction in pressure which enables the rock to melt, leading to magma foundation.
Explanation:
It is known that a rapid decrease in pressure can cause the mantle to melt, even without an increase in temperature. This is called decompression melting.
The answer is B because continental climate is the combination of both hot and cold climates. The Earth isn't only dry nor is it only polar. It is a combination of both that make up the Earth as it is today.
