Which of the following is an example of a legislative or political factor affecting wine demand?

• A. changes in consumption habits
• B. area under vine
• C. strength of the economy
• D. laws prohibiting sale of alcohol

Answer: (D)

Legislative or political factors are government actions that directly regulate or constrain buying and selling. Laws prohibiting the sale of alcohol fit this perfectly because they limit the availability of wine, reducing purchases regardless of price or consumer preference. This kind of regulatory constraint can shift demand downward because the market isn’t able to respond to price changes with actual purchases.

By comparison, changes in consumption habits reflect shifts in tastes and preferences, not policy; area under vine is about production capacity and thus affects supply; and the strength of the economy is an economic condition influencing purchasing power, not a regulatory rule.