Aerospace history is the story of man's effort to improve his transportation and knowledge. Orville and Wilbur Wright were the first to prove man could make controlled, mechanically powered flights. Charles Lindbergh proved the practicality of private flying by flying across the Atlantic alone in a single-engine plane. Today, plans are being made to send astronauts to Mars.
a) increased man's ability to travel farther and faster.
b) caused people to lose interest in space travel.
c) had little significance in aerospace history.
d) been done entirely by the Wright brothers.