问题：
[单选题] Text3 NASA has hired airplane manufacturer Lockheed Martin to build its next experimental plane,which is designed to fly faster than the speed of sound without producing the loud sonic booms that have
A、will need an exact budget of$250 million.
B、will be put into service in 2021.
C、is designed from an entirely new angle.
D、is based on a new commercial purpose.
参考答案：
C、is designed from an entirely new angle.
● 参考解析
