All of the following are nonspecific defense responses made by the human body except
a. the skin as a physical barrier to pathogens.
b. mucus produced in the nasal and oral passages to trap pathogens.
c. wax produced in the ear to trap pathogens.
d. t-cells target specific pathogens.

The correct is the answer is option D.

Explanation:

Non-specific defense response is the immune system that provides defense against more than one type of antigen or pathogen. The non-specific defense provides responses include physical barriers, protein defenses, cellular defenses, inflammation, and fever. Mucus in respiratory tracts and nose traps microbes and pathogens from invading the body.  

Wax also captured foreign bodies and other pathogens from entering our ears. Non-specific defenses are surface coverage defenses.  

T-cells are the specific white cells that target specific antigens or pathogens that are a specific defense provided by the specific immune system.

Thus, the correct answer is option D.