Ithink its a i'm just double checking because ragweed cant hurt you but your body dosnt realize that
what happens when a person who is allergic to ragweed encounters ragweed?

a. ragweed antigens bind to mast cells, which release histamines.

b. ragweed antibodies attack the immune system.

c. mast cells release antihistamines into the bloodstream.

d. the cells of the immune system become weakened.