Suppose the PPC of a producer producing two goods, A and B, is a straight line. Which of the following is true regarding the opportunity cost for the producer?

For every extra unit of A produced, the producer does not give up any of B. For every extra unit of A produced, the producer gives up less of B. For every extra unit of A produced, the producer gives up more of B. For every extra unit of A produced, the producer gives up the same amount of B. For every extra unit of A produced, the producer is able to produce more of B.