In addition to the labor and materials used to make wine, the reputation of the vineyard where the grapes originate plays a role in determining the price of the finished wine. Ttherefore, an expensive wine is not always a good wine. Which one of the following is an assumption on which the argument depends? ["The reputation of a vineyard generally plays a greater role than the quality of its grapes in determining its wines' prices.", 'The reputation of a vineyard does not always indicate the quality of its wines.', "Wines produced by lesser-known vineyards generally are priced to reflect accurately the wines' quality.", 'Price is never an accurate indication of the quality of a bottle of wine.']