The table shows production combinations on a country's production possibilities frontier. Which of the following is an example of a point that is unattainable?
A) 10 units of good X and 16 units of good Y
B) 6 units of good X and 28 units of good Y
C) 3 units of good X and 35 units of good Y
D) 0 units of good X and 40 units of good Y
Answer: A