Summary: Doctors recommend frequent exercise to maintain a healthier lifestyle

Options:
a. Exercise is necessary for a healthy lifestyle
b. Exercise is recommended for a healthy lifestyle
c. Exercise is required for a healthy lifestyle
d. Exercise can help a healthy lifestyle
Identify which of the four options is the most accurate answer based on the given summary.
Based on the given summary, the most accurate answer among the four options would be: b. Exercise is recommended for a healthy lifestyle.