Answer: I would contend that the right answer is the B) Extending the school year will cost approximately sixty-six million dollars, and the gains have not been proven.
Explanation: Just to elaborate a little on the answer, it can be added that a counterclaim is, in basic terms, an opposing claim to the one made. The statement contends that the educational year should be extended allegedly in order to reduce the learning gap that occurs over the summer. An effective counterclaim stresses the extraordinary cost of such measure (of extending the school year) and the lack of evidence that can confirm its effectiveness.