I had slept in until 8:36 a.m. and I did n't know if I could forgive myself for wasting so much dazzling daylight . I slammed down some breakfast , slathered on the SPF 50 , and raced out the door , determined to soak in all of the rays the Juneau Powers That Be were willing to send my way . I raced my mountain bike to the base of Mount Juneau , and in my typical way - too - excited - about - a - nice - day style , I burned a lot of matches getting there . I have to admit I was pretty fried just six miles in , but I had so much ground to cover and so little time to do it , I could n't hold back .

Question: What may be the reason why they got a sunburn even though they put sunscreen on ?
Answer: They sweat so much that the sunscreen came off .They did n't use a high enough SPF .They did n't apply enough .None of the above choices .