Very difficult Sentence Correction problem from the new Official Guide 2019

Question

Technically, “quicksand” is the term for sand **that is so saturated with water as to acquire a liquid's character**. (A) that is so saturated with water as to acquire a liquid's character (B) that is so saturated with water that it acquires the character of a liquid (C) that is saturated with water enough to acquire liquid characteristics (D) saturated enough with water so as to acquire the character of a liquid (E) saturated with water so much as to acquire a liquid character

Answer 1

The answer is B.

Basically, you're repeating "that" twice.

In general, try to find the answer that makes the most sense when strung together.