Examlex
In each group. select the sentence with the correct relative pronoun and punctuation.
Marginal Rate of Substitution
The speed at which a consumer is prepared to exchange one product for a different one while keeping their level of satisfaction constant.
Snails
Slow-moving, gastropod mollusks with a spiral shell, some species of which are eaten as delicacy.
Big Macs
A standard sandwich sold by the international fast-food chain McDonald's, often used as a reference in comparing purchasing power between countries.
Perfect Substitutes
Products that serve as substitutes for each other without diminishing the satisfaction of the user.
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