Who is the most "fit"? a. a professional athlete (eight digit income) who is good health but unmarried and has no children. b. a foster parent (modest income) who is in good health and parenting an adopted child. c. a professional athlete (eight digit income) who is good health but unmarried and has no children and a foster parent (modest income) who is in good health and parenting an adopted child, if they are living together. d. a single parent (minimum wage income) who is in fair health and struggling financially to raise two children?