antibodies are transfered from mother to child at birth and through breast milk to nursing infants
a person with type A blood has type A antigens and anti B antibodies, a person with type AB blood has both type A and B antigens and no antibodies and also, we don't get fresh supply of antibodies from organic and healthy diet but those diets rather help improve our immunity.
so this makes the last point the correct option because breastmilk contains antibodies to improve the immune system if the infant and also there is transfer of antibodies between the infant and the mother through the umbilical cord.