For proper functioning we require some of each of the four major macromolecules. Which statement below is a true statement concerning macromolecules.

A.We make all of them in our bodies, building them by dehydration synthesis.

B.We can create them through photosynthesis and use them during respiration.

C.We absorb them from our atmosphere when we breathe

D.We get them from our food and then break them down to use them for life sustaining processes.