题目选项分析

Very reluctant to have any extra weight on his plane when he attempted his solo transatlantic flight, Charles Lindbergh refused to carry even a pound of mail, despite being offered $1,000 to do so.

Being very reluctant to carry any extra weight on his plane when he attempted his solo transatlantic flight was the reason that Charles Lindbergh refused to carry even a pound of mail, despite being offered $1,000 to do so.