Which of the following are chemical reactions? Check all that apply A. Pouring chocolate sauce into milk to make chocolate milk
B. Making caramel sauce
C. Getting a suntan
D. Mixing oil and vinegar to make salad dressing

b and c

Explanation:

In b you'll be mixing and heating up the sauce creating a new compound from  older components and in c, the ultraviolet lights will change your skin cells.

the sun's light combined with the visible wavelenghts form what is called ultraviolet radiation, which are the long waves at the end of a visible light sprectrum.

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bioteacher101