Dana, a Three-Year-Old Autistic Child, Is Being Taught to Answer

Dana, a three-year-old autistic child, is being taught to answer questions with a "Yes" or a "No." She was given verbal praise and the cookie when she answered "Yes" to questions like "Do you want a cookie?" (a preferred food) and "No" when she answered "No" to questions like "Do you want corn?" (a non-preferred food) .Additionally, she was praised if she answered "Yes" to questions like "Does a cow say 'moo'?" or "No" to the question, "Is this a shoe?" when shown a picture of a boat.This productive behavior is being encouraged by arranging which of the following so they are response contingent?

A) antecedents
B) conditioned stimuli
C) reinforcers
D) cognitions