Over the past century, both in the United States and elsewhere around the world, our understanding of health has:_____.
a. narrowed from a focus on imbalances to a focus on the presence or absence of disease.
b. broadened from a focus on alterations in body structure or biochemistry to a focus on the subjective experience of illness.
c. broadened to incorporate not only the absence of disease or infirmity but also the ability to make life-enhancing choices.
d. not changed significantly.