Consider the following numerical model:

C = 800 + 0.5YD

I = 0.25Y-3000i+600 G = 1200

T = 800

4)If public spending (G) was to increase by 200 (from 1200 to 1400), what would the change in income (Y) in the goods-market equilibrium be, assuming the interest rate (0.75%) remains unchanged?

A) +1200.

B) -1200.

C) +800.

D) -800.

E) none of the above.