Which explanation could a student use to explain how electromagnetic and mechanical waves travel? O A Neither electromagnetic nor mechanical waves travel in a vacuum and neither transfers energy.
O B. Both electromagnetic and mechanical waves travel in a vacuum and they both transfer energy.
O C. Mechanical waves can travel through a vacuum and a medium and they transfer energy.
OD. Electromagnetic waves can travel through a vacuum and a medium and they transfer energy.

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d