please help, need answer fast!
Oneta writes an algebraic expression with three terms. The y-term has a coefficient of -3, and the x-term has a coefficient of 1. The expression does not have a constant term. Which expression could she have written?

a. x - y^2 - 3y
b. x - 3y + 6
c. x + 3y^2 + 3y
d. x + 3y + 7