It’s one’s bad habits, rather than a certain natural disaster, one’s longevity (长寿)for most of the time.
A. that affects
B. which affect
C. which affects
D. that affect
网友回答
A. that affects
B. which affect
C. which affects
(答案→)D. that affect
解析：句意:是个人的习惯而不是自然灾害影响人长寿的大部分时间。这里强调句型，这里被强调的主语，真正的主语one’s bad habits，主语是复数，故排除AC, 判断强调句型的方法是把It was that这三个词去掉，整个句子不缺成分，意思完整。故选D。