How can you measure your level of intensity during a physical activity?
a. record the number of minutes you exercise
b. measure the maximum weight you can lift in one attempt
c. take your heart rate or pulse
d. subtract your physiological age from your actual age

What is the main goal of recommended dietary allowances (rdas)? to inspect school cafeterias across the united states to regulate foods sold at supermarkets and farmers' markets to investigate claims of tainted food being served in restaurants to indicate daily nutrient requirements