The refinement of whole grains transforms whole-wheat flour into:. A. whole-wheat flour dust.
B. white flour.
C. unrefined whole-wheat flour.
D. enriched whole-wheat flour.

Active immunity refers to: a. the defenses people are born with. b. temporary immunity granted from another source. c. immunity gained through immunization and exposure to diseases. d. natural immunities that protect humans from other animal diseases