How does the body build resistance to certain pathogens? A) by forcing the pathogens out of the body
B) by producing macrophages when the body encounters an antigen
C) by exposure to pathogens, or having a certain disease
D) by getting antibiotics for an infection

Does the weight loss program have practical significance? a. no, the program is not practically significant because the results are likely to occur even if the weight loss program has no effect. b. yes, the program is practically significant because the results are too unlikely to occur by chance. c. yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant. d. no, the program is not practically significant because the amount of weight lost is trivial.