Answer to Question 1
C
Feedback:
One of the notable achievements has included a decline in deaths from heart disease and stroke, not diseases of kidney, lung, or prostate.
Answer to Question 2
A
Feedback:
IgM stimulates complement activity. IgD functions as an antigen receptor. IgG protects the fetus before birth against antitoxins, viruses, and bacteria. IgA helps in defense against invasion of microbes via nose, eyes, lungs, and intestines.