Which of the Following Is a True Statement

Which of the following is a true statement?

A) When a community converts a former railway line or crumbling aqueduct into a new walking and biking path, physically active people are still not interested in physical exercise.
B) People do not necessarily walk more when sidewalks are available and safe.
C) Regular physical activity can reduce the risk of heart disease, diabetes, numerous cancers, anxiety, and depression; it also provided guidance for the levels of exercise that yield the most benefits.
D) All of these are correct statements.