In a perfectly competitive industry in the short run, if the government places a per minus unit tax on output, which of the following will occur? A.Marginal costs will not change comma but the industry supply curve will increase. Marginal costs will not change comma but the industry supply curve will increase. B.Marginal costs will decrease comma and industry supply will decrease. Marginal costs will decrease comma and industry supply will decrease. C.Marginal costs will increase comma and industry supply will decrease. Marginal costs will increase comma and industry supply will decrease. D.Marginal costs will increase comma and industry supply will increase. Marginal costs will increase comma and industry supply will increase