Suppose That Miller Repeated His Chemical Evolution Experiment but Without

Suppose that Miller repeated his chemical evolution experiment but without a source of electrical sparks.What would be the purpose?

A) to test if electrical energy is required for chemical evolution
B) to test the hypothesis that reduced molecules are required for chemical evolution
C) to test the hypothesis that both reduced molecules and electrical energy are required for chemical evolution
D) to make sure that the glassware had not been contaminated,and that any new molecules found were actually produced by chemical evolution