You are presented with the question "What kills bacteria?" and the following answer choices: 
- rays or beams
 - Plasma cells
 - Cooking
 - an electric stove
 - Petri dish
 - deal
 - phlange
 - evaporation

Now knowing that plasma cells are activated B cells that secrete antibodies and antibodies kill bacteria, choose the best answer.


 

  Plasma cells       