What causes scientific knowledge to change over time? A. Living systems are constantly changing, so previous explanations
may no longer apply.
B. Scientists try new ideas to keep their work interesting.
O C. New data can lead to a reevaluation of earlier scientific
explanations.
D. New technology proves that earlier scientists based their
explanations on biased views,

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