Which statement by the parent would indicate that they understand the benefits of breastfeeding?

I won't have to use contraception while I am breastfeeding since I have not yet resumed my periods.

The commercial grade formula I can buy at the store has the same composition as my breastmilk.

As my baby grows, I will need to supplement, since the volume of breastmilk I produce stays the same.

The amount and composition of my breastmilk will change to meet my baby's needs as they grow.