这个题目应该选哪个？怎么分析？

Question

10．______ it is true that a successful businessman or inventor will usually become rich, many other people who are outstanding in their fields take little notice of personal possessions.A. While B. Since C. Unless D. If

Answer 1

目的——通过对蒙自市城区中老年人体育健身人数、年龄结构、职业背景、性别比例、每周运动时间、运动强度、体育健身项目种类及受欢迎程度等情况的调查与分析，