Is there multiple choice answers?
C. On average they tend to die about 10 years earlier
"From 10AM to 4PM are the most dangerous hours for exposure to the sun."
The first two don't make any sense. As for SPF, the FDA minimum is 15 but the recommended minimum is 30. 10AM-4PM are the peak sunlight hours, generally (unless you live in Antarctica of course).
False, the inventors claims were clearly not well tested
