Which sentence has an elliptical adverb clause with an understood word or words?

Water turns into ice when the temperature is lowered to 32°F.
Methyl alcohol boils at a lower temperature than water.
As we travel higher than does the sea level, the boiling point of water drops.

Question

Which sentence has an elliptical adverb clause with an understood word or words?
 	
	Water turns into ice when the temperature is lowered to 32°F.
	Methyl alcohol boils at a lower temperature than water.
	As we travel higher than does the sea level, the boiling point of water drops.

anonymous · Answer

An elliptical adverb clause is a clause that has implied words. I would say B.

anonymous · Answer

Thanks I've been stuck on this test all day so trying to get help anywhere