3. The body's natural defense against pathogens includes skin, tears, saliva, _
.
A mucous membranes, and the respiratory system
B mucous membranes, and the digestive system
C and the digestive and respiratory systems
D the lungs, and digestive system
Tonic
St Disease

it's false.

"every person has their limitations which prevent us from accomplishing something. some are better than mathematics for example and some are worse. those people who are worse might never be able to become mathematicians, but that does not mean that they would not be great at doing something else."

i think the answer would be b.