Use the Table the Supply Schedule for Beaded Necklaces

Use the table The Supply Schedule for Beaded Necklaces. What can be inferred about Abby when the price of necklaces is $20?
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A) Her opportunity cost of producing a necklace is higher than $20.
B) Her total cost of producing a typical necklace when she produced four necklaces is higher than $20.
C) She has a net gain of producing necklaces when the price less than $20.
D) She values the opportunity cost of her time to produce one necklace at $20.