Javier was asked to evaluate the expression 12y + 3y when y=1. Javier simplified the expression to 15y before finding the answer. Are the expressions 12y + 3y and 15y equivalent? A. No, because both expressions are equal 15 when y = 1.

B. Yes, because both expressions equal 15 when y = 1.

C. No, because both expressions do not equal 15 when y = 1

D. Yes, because both expressions do not equal 15 when y = 1​