Which noun refers to the amount of something in general?

• A. Mass
• B. Size
• C. Quantity
• D. Volume

Answer: (D)

The key idea here is choosing a word that means “how much of something there is, in general.” Volume focuses on space or capacity—the amount of space something occupies. It’s used for liquids or containers, like the volume of water in a bottle, which is about space rather than a count of items. Mass is about how heavy something is or how much matter it contains, not the general amount of items. Size refers to the dimensions or extent of an object. Quantity is the broad term for the amount or number of something, which fits the idea of “how much there is” in general. So the word that best captures that general sense of amount is quantity.