Nora's Grandfather Lived to Be 87,and Her Father Is Still

Multiple Choice

Nora's grandfather lived to be 87,and her father is still alive at the age of 98.Nora concludes that longevity is inherited and anticipates a very long life.Nora should know that

A) there is no reliable data on the heritability of longevity,and random factors probably contributed to the long lives of her relatives.
B) the current generation is experiencing a shorter lifespan than the previous generation due to environmental toxins and limited physical activity.
C) rather than inheriting longevity directly,people probably inherit risk factors that influence their chances of dying earlier or later.
D) the heritability of longevity is approximately 0.95,indicating that longevity is directly related to genetic factors.