Answer:
Conditioned stimulus.
Explanation:
Leukemia may be defined as the cancer of the bone marrow and the blood forming tissue. Chemotherapy is used to target the cancer cells and cure the leukemia.
Jane had leukemia and the waiting room has become the conditioned stimulus for him. The conditioned stimulus earlier is the neutral stimulus but later become strong stimulus after combining with the unconditioned stimulus. Jane do not feel nauseated in the waiting room but now the waiting room has become nauseated for him.
Thus, the correct answer is option (c).
Either mechanical or physical. I would say physical though.
