In 1952, Chemists Harold Urey and Stanley Miller Mixed Ammonia

In 1952, chemists Harold Urey and Stanley Miller mixed ammonia, methane, and hydrogen in a closed container, zapped it with electrical sparks, and found that

A) they could induce cold fusion.
B) amino acids cannot form this way.
C) single-celled microorganisms had been spontaneously created.
D) amino acids had been created.
E) they had created life in a test tube.