15. Which statement best describes a production possibilities curve (PPC) with a straight line?
OAPPC with a straight line indicates that the production is under increasing costs.
OAPPC with a straight line indicates that units A and B are producing too many units.
OAPPC with a straight line indicates that for every unit A or B relinquishes, no additional units can be produced.
OAPPC with a straight line indicates that for every unit A or B relinquishes, an additional unit of an opposing good is produced.