In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

A group of researchers has (1) ______ that pleasure and positive states of mind are better for our health. This new intellectual approach to health is not only more powerful, but also has no side effects. Central to this claim are recent findings that even getting an education may add as much as 10 years to your (2) ______. That is why National Geographic featured John de Rosen in its book The Incredible Machine, which discussed old age. De Rosen, an artist, continued to paint until the week he died at age 91. The book notes: "Some scientists believe that retirement to a (3) ______ lifestyle initiates or aggravates medical problems, thus shortening life. According to a study of retired people, adults over 65 can learn a (4) ______ skill, like oil painting, as readily as younger students." So retiring from a job in a sense means retiring from life unless (5) ______ by some other, preferably new activity.