12.What contribution did C.M. “Dad” Joiner make to the oil industry in Texas?
 A. He donated his expertise to help other wildcatters succeed.
 B. His discovery at the East Texas field resulted in another boom in Texas.
 C. He discovered oil at spindletop 
 D. He became a Texas millionaire 
 And the others too so I can check to see if I’m right on them ?