Question

melanoma rates are higher in areas of the united states with a high number of sunny days each year. melanoma rates have been observed to decrease in some countries in response to public health campaigns that promote regular use of sunscreen. other types of skin cancer, which are similar to melanoma, are linked to uv exposure. based on this information, what is the most comprehensive hypothesis that can be generated? people who use sunscreen spend more time inside and therefore do not develop skin cancer. skin cancer is caused by chemicals in the skin, and these chemicals are inactivated by sunscreen. people who use sunscreen have lower rates of skin cancer in general. people who use sunscreen have lower rates of melanoma.

Explanation:

The text mentions melanoma rates are related to sunny days and decrease with sunscreen - use campaigns. It also notes other skin - cancers similar to melanoma are linked to UV exposure. The most comprehensive hypothesis should cover melanoma and other skin cancers related to UV exposure, and the role of sunscreen. Option C covers both melanoma and other skin cancers and the effect of sunscreen use on their rates.

Answer:

C. People who use sunscreen have lower rates of skin cancer in general.