【单选题】

What does the author mean by saying "Saudi Arabia will have to learn how to drill human oil wells. "( Para. 4)
A．The Saudi Arabian people will learn how to drill a well by themselves.

B．Saudi Arabia will reform its education system to train more creative youth.
C．Saudi Arabia will encourage more people to drill more oil wells.
D．Saudi Arabia will encourage the people to produce more oil from the wells.