问题详情

Although scientists have______long the human appendix as______organ, there is a growing body of evidence indicating that the appendix does in fact have a significant function as a part of the body"s immune system.
A．overestimated … a minor
B．discounted … a vestigial
C．valued … a major
D．ignored … a pivotal
E．studied … an inaccessible请帮忙给出正确答案和分析，谢谢！