问题详情

“... People who die wondering, What if？” (Line 3, Para. 3) refers to “those ________”.
A) who think too much of the dark side of life
B) who regret giving up their career halfway
C) who think a lot without making a decision
D) who are full of imagination even upon death请帮忙给出正确答案和分析，谢谢！