Aggregate demand (AD = C + I) is parallel to consumption function since autonomous investment shifts it upward, so (A)-(IV).
Aggregate supply (AS) is a 45-degree line through the origin (AS = Y), so (B)-(III).
Autonomous investment is fixed regardless of income, so it is parallel to x-axis, (C)-(II).
Consumption function is upward sloping with a positive y-intercept (C = C-bar + bY), so (D)-(I).