I believe the answer should be solar
It would be 100 times greater if you are going from a pH of 5 to 7
Am certain that the factor that prevents us from finding fossils from the Precambian era is that Most rocks from that era are deeply buried. The precambrian is the informal name for the large expanse of time preceding the current Phanerozoic Eon. It began with the Earh's Formation about 4.5 billion years ago and lasted until the advent of multicellular life about 542 million years ago.
More often. please correct me if I am wrong
T pairs with A ( answer a.).
Hope this helps !
Photon