John Gottman, who studies the value and consequences of close personal relationships and marriages ...

John Gottman, who studies the value and consequences of close personal relationships and marriages offers several conclusions drawn from his own and others' research. Which of the following answers is not one of these conclusions?
 
  a. People with good friends usually have less stress.
  b. People with good friends usually live longer.
  c. People who have good marriages live longer than those who don't.
  d. The length of your life is determined far more by the state of your close relationships than by genetics.
  e. The length of your life is determined far more by genetics than by the state of your close relationships.