What is one of the reasons that Swift gives for his proposal?

AThere is a famine in the land, and children are plentiful.

BIrish infants' fathers are already selling them as servants to the rich.

CChefs in Ireland are already serving infant meat in the finest restaurants.

DHarvesting poor infants will reduce the number of papists in the country.

This is a really weird story but I can't seem to find the answer!?!?!?!?!