Choice "C" is correct. When a contract for the sale of goods includes an F.O.B. (free on board) delivery term, that term controls risk of loss. The seller has the risk of loss until the goods are delivered at the location named after the F.O.B. term. Here, the location is the purchaser's loading dock, so risk of loss remains with the seller until the goods are delivered there.
Choice "a" is incorrect. When the delivery term is F.O.B. purchaser's loading dock, risk of loss does not pass to the purchaser until the goods are delivered at the purchaser's loading dock.
Choice "b" is incorrect. Under the UCC, risk of loss does not depend upon title, but rather upon the delivery term.
Choice "d" is incorrect. Risk of loss under an F.O.B. term passes when the goods are delivered at the named location, not when the goods are accepted by the purchaser.