The graph depicts the following situation: A consumer consumes good x and good y. She initially has an income of I=$150, and faces prices of px=$1 and py=$3. Then, the price of good x doubles. In response to the rising prices, the government gives the consumer a lump-sum payment of $30. What do points z and k in the graph stand for?
A. z=$100 and k=$150
B. z=75 units of good x and k=150 units of good y
C. z=50 units of good x and k=$150
D. z=75 units of good x and k=60 units of good y
E. None of the above
