Expression A: x+x+x expression B: 3+x Are the two expressions equivalent? A. Yes, because for x = 6, the value of Expression A is 9 and the value of Expression B is 9. B. No, because for x = 6, the value of Expression A is 18 and the value of Expression B is 9. C. No, because for x = 6, the value of Expression A is 6 and the value of Expression B is 18. D. No, because for x = 6, the value of Expression A is 9 and the value of Expression B is 6.