Darron produces both shoes and socks. His Production Possibilities Frontier (PPF) is given above. Which of the following statements can correctly characterize the properties of Darron's PPF between shoes and socks?

Question 14 options:

	As Darron produces more socks, the opportunity cost of socks increases
	As Darron produces more shoes, the opportunity cost of shoes decreases
	It is efficient for Darron to produce any combination of shoes and socks that is inside of the PPF
	All statements are correct