In the Early 1950's, Stanley Miller and Harold Urey Conducted

In the early 1950's, Stanley Miller and Harold Urey conducted a series of pioneering laboratory experiments involving simulations of the early Earth. What did these experiments reveal?

A) that the early Earth was constantly bombarded by asteroids and comets
B) that under the conditions on the early Earth, they could synthesize some of the building blocks of life in a laboratory
C) that the early Earth was much hotter than anyone had suspected
D) that the early Earth had received microscopic life in meteorites that had come from Mars in the very beginning of the solar system's history
E) that the early Earth had to have been covered with a thick layer of ice, just like Jupiter's satellite Europa