The answer is d I just realized(-_-)
Answer:
True ( in my option)
Explanation:
I took gym for 6 years of my school life and what I learn from those classes was to keep your back straight when you do any excrice because that would keep your back straight when your not doing excrice. I hope you like my answer.
D or a. The others shouldnt be correct
A pulmonologist A pulmonologist is a physician who specializes in the respiratory system. From the windpipe to the lungs.