Fact 1: Plasma cells are activated B cells that secrete antibodies.

Fact 2: Antibodies are produced by plasma cells.

Given the two facts above, answer the question "What secrete antibodies?" with the following options: 
- parasites
 - barnacles
 - the body's largest organ
 - major threat to health
 - activated b cells
 - resistance activities
 - fur seals
 - it keeps an organism warm


 

     activated b cells    