Three of the largest automobile dealers agreed among themselvesas to what price

Three of the largest automobile dealers agreed among themselvesas to what price they would pay to manufacturers for windshields toput in new vehicles. Would this constitute illegal price-fixing? Ifso what kind?a. No. This is not illegal price fixing.b. Yes. This is buyers illegal per se pricefixing.c. Yes. This is sellers illegal per se pricefixingd. Yes. This is both buyers and sellers illegalper se price fixing.