Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. When closely related individuals mate, their offspring are likely to manifest genetic diseases that will probably be passed on to the next generation. B. Genetic diseases inherited from parents that are not related make it less likely that the affected offspring will survive to adulthood and reproduce. C. When two related individuals mate, their offspring may survive to adulthood, but they are unlikely to reproduce. D. There is a tendency for the offspring of closely related parents to have genetic diseases that make it less likely they will survive and reproduce.