Consider the following system of equations:
11x + 12y = 13
14x + 15y = 16
Using the solution (x, y) to this system of equations, determine the value of x + y (Hint: Solve the system of equations first to find the x and y values!)
A. x + y = -2
B. x + y = -1
C. x + y = 1
D. x + y = 2