The overwhelming reason that high-protein, low-carbohydrate diets don’t work is that
a. people cannot stay on them for a long time.
b. they promote eating disorders.
c. they only require a short period of time to work.
d. they don’t eliminate many calories.
the answer is not letter d.

Probably because you wake up early. even when i get a good nights sleep i still feel tired if i wake up early. or maybe you just need coffee.

Bmust be the answer, as technically all organs move, so a is incorrect. all organs are made of different types of cells, so that isn’t a problem, so c is also incorrect. human hearts are very similar to many other animals’ hearts, so d is also incorrect, yet the heart is made of muscle, which is hard to grow in the lab so it would be correct to say b