Any convenient method to solve the following system of equations: x + 3y = -7; y - 5z = 0. The system is dependent. Express the solution set in terms of one of the variables. Which of the following options is correct?

A) Solve for y in terms of x and z.
B) Solve for x in terms of y and z.
C) Solve for z in terms of x and y.
D) Solve for y in terms of x and z.