44. The author finds great similarity between

A. the weight of the hang glider and that of the ultralight airplane

B. ultralight airplanes and military aircraft

C. the inventiveness of John Moody and that of Octave Chanute

D. the controls used in the Wright brothers´ flyer and those used in today´s ultralight air-planes

45. The theme of this passage is about

A. the flying snowmobile

B. the history of recent aviation

C. how the ultralight plane flies

D. the ultralight plane — a recent development