I. The following figure shows a consumer optimum. Using the graph, answer the following questions.

1. The budget line can be kinked due to: select one from the following options.

A. Quantity discount for bulk purchase of good Y

B. Quantity restriction on the purchase of good X

C. Quantity restriction on the purchase of goods Y

D. Quantity discount for bulk purchase of good x

2. In case that the price of good x was 10. What is the price of good Y?