A Patient Says, "There Are So Many Kinds of Bacteria

A patient says, "There are so many kinds of bacteria. How does my body know which ones to kill and how to kill them?" What would be the nurse's most accurate response?

A) "The alkaline environment in the stomach kills any bacteria you might swallow on food or in drinks."
B) "Chemicals on the skin kill many of the bacteria from the environment."
C) "Special white blood cells called toll cells help your body identify disease-causing bacteria."
D) "Your mucous membranes help to filter out and kill bacteria."