A new sunscreen has been developed that is supposed to be more effective at preventing sunburn. 30 participants spray one arm with the new formula and spray the other arm with the leading formula. After 4 hours in the sun, their skin is evaluated for any redness. What is the Independent Variable?a. the 30 arms with the old formulab. the 30 arms with the new formulac. Amount of rednessd. Type of sunscreene. the 15 arms with the new formula

The correct answer is : b. the 30 arms with the new formula

Explanation:

Independent variable is a variable that is present in the experiment and research experimenting about and do not depend on any other variable. In this experiment the researcher is experimenting about the new sunscreen and its effect on the people.

In this experiment the 30 arms with new formula is independent variable that would change or altered the dependent variable.

Thus, the correct answer is : b. the 30 arms with the new formula

c. live where it’s cold and icy