Five Pieces of Information About Early Earth Are Stated Below

Multiple Choice

Five pieces of information about early Earth are stated below.Which could be used as justification for a condition used by Miller and Urey in their experiments to test the possibility of organic molecule formation during Earth's earliest history?

A) Impacts by comets and meteorites on Earth's surface were frequent.
B) Oxygen was absent in Earth's atmosphere until photosynthetic organisms arose.
C) Earth was formed about 4.6 billion years ago, and life arose on Earth about 4 billion years ago.
D) Earth underwent many physical changes during its earliest history.
E) Geological evidence has helped scientists develop hypotheses about how Earth's atmosphere has changed over time.