In the 1920s, Aleksandr Oparin and John Haldane each made independent proposals about the formation of life on Earth. What did they say about essential organic molecules?

A) that these could not have been made in the absence of life in the conditions on primordial Earth
B) that these could have been made in the presence of life in the conditions on primordial Earth
C) that these could have been made in the absence of life in the conditions on primordial Earth
D) that these could have been made in the absence of life in the conditions on modern Earth