The benefit of the circuit of fetal blood course through the ductus arteriosus is the ductus arteriosus will permit more blood to go to the placenta and sidestep the lungs (since there is no blood required there yet). I hope the answer will help you.
C) all white blood cells because like aids hiv attacks the immune system slowly killing you until u have no immune system left
The last one. Micronutrients. Brainliest please!