Adam has a schema for saying, "Hi." He has a second schema for holding out his hand. He has another schema for making eye contact. With time, Adam is able to combine the simple schemas into a complex structure of a greeting (i. e., simultaneously making eye contact, saying "Hi," and holding out his hand to be shaken). According to Piaget, Adam is demonstrating .a. organization.
b. hypothetical-deductive reasoning.
c. reversibility.
d. class inclusion