a. is the most reasonable. if i'm wrong srry.
The answer is B, The relative pronoun is that; it functions as part of the adverb clause.
D which is more valuable, goals or relationships
Tall mountain ranges prevent moisture-rich clouds from reaching areas of lee, or protected side, of the range. as air rises over the mountain, water is precipitated and the air loses its moisture content. a desert is than formed in the preside “shadow” of the range.
hope this helps :)
