Which of the following is the primary responsibility or focus of a medical doctor (m.

Since there isnt any choices i believe they need to have a degree in science and medicine in order to become a medical doctor. They need to practice safety and how to deal with medical tools. They also need to practice on how to help a patient in need. 

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.