Which of the Following Statements Is TRUE Regarding the Earliest

Multiple Choice

Which of the following statements is TRUE regarding the earliest photosynthetic organisms on Earth?

A) These organisms likely possessed two photosystems.
B) Given the abundance of H₂O on early Earth, these organisms used H₂O as an electron donor.
C) The organisms likely used molecules other than water (i.e., H₂S) as electron donors.
D) The organisms likely produced oxygen as a waste product, resulting in Earth's current atmosphere.
E) These organisms likely used both inorganic molecules and water as electron donors.