Question: Karen and Andie went to the beach together. Andie was trying to work on her tan so she used a sunscreen with a SPF 15, while Karen used a sunscreen with SPF 45, which Sunscreen protected the skin less? 
 Option1: Sunscreen SPF 15 
 Option2: Sunscreen SPF 45 
 Explanation: A sunscreen with a higher SPF protects the skin longer.
Sunscreen SPF 15