单选题 According to scientists, if the energy in the atmosphere were put under our control, what would happen?

A、 We have an inexhaustible supply of energy from it.
B、 This could bring the world to an energy crisis.
C、 The sources of energy on earth would become unreliable.
D、 We find ourselves in difficult position with environmental pollution.

【正确答案】 A

【答案解析】见最后一段首句。unending意即inexhaustible。