Diagram 6-1: Good X and Good Y Refer to Diagram 6-1. In this instance: A. the BC line is diagonal because the amount spent on both goods is less or equal to income. B. the consumer will find that every point along the I3 line is outside the budget constraint. C. the consumer will find the highest utility where x and y just touch the I2 line. D. all of the above and the consumer can choose any point on or below the budget constraint line BC