Answer:
<em>A population is a distinct group of individuals.</em>
Explanation:
population is a distinct group of individuals, whether that group comprises a nation or a group of people with a common characteristic. In statistics, a population is the pool of individuals from which a statistical sample is drawn for a study.
B social conditions
C physical conditions
C. Janine should increase the intensity or length of her exercise programs because it is more difficult to maintain high fitness levels as you age.
Hepatitis C<span> virus (HCV) can cause an immediate illness affecting the liver, but it more commonly becomes a silent, chronic infection that leads to liver scarring (cirrhosis), cancer, liver failure, and death. HCV is most commonly transmitted through sharing needles or exposure to infected blood.</span>
