Randall and Rachel are brother and sister. Randall does not enjoy exercising, but Rachel can't get enough. Based on the information you know, which of the following statements is true?
A. Rachel may earn up to 8% more money in her life.
B. Randall may earn up to 8% more money in his life.
C. Rachel may earn up to 10% less money in her life.
D. Randall may earn up to 10% less money in his life.