Breastfed infants typically are resistant to disease because of
active immunity
passive immunity
immune tolerance
immune memory

Passice immunity

Explanation:

Breast milk, produced by female mammals (including humans), besides being rich in fat and protein is full of IgA. IgA is the immunoglobulin (immune system signal proteins) that is present in body secretions, such as milk.

The baby that is fed from the mother's breast ingests these defense proteins that allow it to tolerate different pathogens and toxins.  

It is considered passive immunity, as it does not generate memory and depends on a continuous dose to maintain defense levels.

creative diagnostics provides a protocol for total protein extraction based on ripa which is widely used.

i am positive it is c. condensing but i may be wrong