Choice "D" is correct. The general rule is that a buyer takes subject to security interests in the goods bought, but one large exception to this rule is that any buyer from a merchant in the ordinary course of business usually takes free of a security interest previously given by the merchant.Choice "b" is incorrect. A merchant buyer who purchases goods for resale owns inventory rather than consumer goods. Note that if a merchant buyer purchases inventory in the ordinary course of the seller’s business, the merchant buyer generally will hold the inventory free of a perfected security interest previously given by the seller.Choice "c" is incorrect. A merchant buyer who purchases goods for use in its business owns equipment rather than consumer goods. Note that if a buyer purchases the equipment in the ordinary course of the seller’s business, the buyer generally will hold the equipment free of a perfected security interest previously given by the seller.Choice "a" is incorrect. The general rule is that a buyer takes goods subject to security interests existing in the goods. There is an exception to this rule for consumers who, in good faith and without notice of any security interest, purchase the goods from consumers, but the exception applies only when the security interest is perfected automatically, and here we are not told how the security interest was perfected.