Mr Castillo Gives an Assignment to His Third-Grade Class Dealing

Mr. Castillo gives an assignment to his third-grade class dealing with hypothetical situations. Most of the class does not do well on this assignment. When Mr. Castillo asks them what happened, most of them reply "I did not understand it." Mr. Castillo is frustrated because he thinks these children are lazy and unmotivated. According to Piaget's theory, what is happening?

A) These children are probably underachievers and lazy.
B) The teacher is expecting concrete operational thinking from preoperational kids.
C) The teacher is expecting formal operational thinking from formal operational kids.
D) The teacher is expecting formal operational thinking from concrete operational kids.