The following topic sentence is an opinion.
It is very important to get into the habit of wearing sunscreen of at least SPF 15 or higher every day.
Which of the following provides a fact that supports this topic sentence?
A. SPF, an acronym which stands for "sunscreen protection factor," repreents a laboratory measurement for the effectiveness of sunscreen.
B. Although humans can get vitamin D in their diets, it is also possible to acquire the recommended daily amount of vitamin D through exposure to sunlight.
C. The first sunscreens were mass-produced and sold in the 1940's.
D. Along with avoiding the sun and wearing sun-blocing clothing, regular sunscreen us has been demonstrated to reduce the risk of skin cancer.