9. Which of the following explains why 2/3 (x + 3) = 2/3 (x − 6) has no solution?

A. The coefficients are different, and the constants are different.

B. The coefficients are the same, and the constants are the same.

C. The coefficients are different, and the constants are the same.

D. The coefficients are the same, and the constants are different.​