human born prematurely during the third trimester will be in the greatest danger due to A. his or her brain not yet being mature. B. his or her bones not yet being mature. C. his or her heart not yet being mature. D. his or her lungs not yet being mature.
One of the greatest concerns is lung development because the lungs develop well into the third trimester. The younger a baby is when born, the greater the possible complications.
