I think the answer is D. A good indicator is the resting heart rate. Exercise strengthen your heart and it makes it more efficient. The resting heart rate shows of the heart is pumping blood normally each time it contracts. Having a normal resting heart rate would mean a healthy heart.
1. 50% will be red
2. 100% will be roan
3. 50% roan and 50% white
Water is polar. Lipids are non-polar.