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.
183.(GWD-6-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.
A.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)
E.Very reluctant to have any extra weight on his plane when he attempted his solo transatlantic flight, Charles Lindbergh
D is wrong for some very specific grammar reasons, and that’s what you should focus on..
I don't quite follow your question about D. The structure here is "X was the reason that Y" where X is a noun phrase and Y is a clause with its own subject. That's OK, but not best. "Money is the reason that most people work." "Jenny is the reason that I moved to Atlanta." Meh. Not wrong, but clumsy.
Further, if X is a very complicated noun phrase, especially one that starts with a gerund, the sentence will quickly become very difficult to understand. "Skiing the black-diamond telemark course with the team is the only reason I brought my racing gear." Wha...?
The grammar issue I alluded to with respect to D is the one that involves "being". Please understand that just as "being" is not always wrong just because it appears in a sentence, it is also not always right just because it is used as a subject. A good way to test whether "being" is correctly used as a subject is to ask yourself a question that the "being" phrase can answer: