GWD6-Q22:

Charles Lindbergh, for his attempt at a solo transatlantic flight, was very reluctant to have any extra weight on his plane, he therefore refused to carry even a pound of mail, despite being offered $1,000 to do so.

Charles Lindbergh, for his attempt at a solo transatlantic flight, was very reluctant to have any extra weight on his plane, he therefore

B.      When Charles Lindbergh was attempting his solo transatlantic flight, being very reluctant to have any extra weight on his plane, he

C.      Since he was very reluctant to carry any extra weight on his plane when he was attempting his solo transatlantic flight, so Charles Lindbergh

D.      Being very reluctant to carry any extra weight on his plane when he attempted his solo transatlantic flight was the reason that Charles Lindbergh

E.       Very reluctant to have any extra weight on his plane when he attempted his solo transatlantic flight, Charles Lindbergh

觉得E没错，但是不知道A哪里错了？

感激~~我居然不知道therefore是副词！！我说为什么没有人问这道题呢~~~

谢谢！！！谢谢！！