Which of the Following Best Describes How Vending Machines Are

Which of the following best describes how vending machines are used?

A) They are likely to be used to sell a much wider array of goods in the future than they have in the past.
B) They are a key element of multilevel marketing.
C) They tend to be widely accepted by consumers for the distribution of goods such as candy, gum, cigarettes, and similar products, but they have met with significant resistance when used to sell more expensive items.
D) They are used much more extensively in Canada than in other countries.