Found That Cheerful People Died Sooner Than Those Who Are

found that cheerful people died sooner than those who are not cheerful.They suggest this may be because

A) people who are not cheerful are more focused on making money and high SES results in better health.
B) cheerful people grow up being more careless about their health and, thus, may encounter health risks.
C) cheerful people engage in more risky physical activities and, thus are more likely to die in accidents.
D) They provided no suggestions as to why this occurred.