(D) suggested that geologists had inaccurately assumed that giant rock plates that meet at the San Andrea Fault generate heat through friction.
Explanation:
As in 1965, Henry found that temperature near the faults was not the same that was discovered earlier by the geologist and was proved by his hole drilling techniques and thus there assumptions of the giant ricks plates that are present at the San Andrea fault produced friction, as they grind through each other, was wrongly assumed.It will provide an instant answer!