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 "antibodies are produced by activated B cells that do what?" with the following options: 
- Animal survival
 - killing insects
 - interact
 - secrete them
 - migrate
 - reproduce
 - competition
 - Allergies


 

    secrete them     