The correct answer is: A. a-1, b-2, c-3, d-4.
Essential goods are goods that are necessary for survival, such as food, water, and shelter. The demand for essential goods is relatively inelastic, meaning that a change in price will have a relatively small effect on the quantity demanded. This is because people will still need to buy essential goods even if the price goes up.
Comforts are goods that make life more pleasant, but are not essential for survival. The demand for comforts is relatively elastic, meaning that a change in price will have a relatively large effect on the quantity demanded. This is because people are more likely to forgo comforts if the price goes up.
Luxuries are goods that are not essential for survival and do not make life more pleasant. The demand for luxuries is very elastic, meaning that a change in price will have a very large effect on the quantity demanded. This is because people are very likely to forgo luxuries if the price goes up.
Prestige goods are goods that are bought to show off wealth or status. The demand for prestige goods is relatively inelastic, meaning that a change in price will have a relatively small effect on the quantity demanded. This is because people who buy prestige goods are often more concerned with the status associated with the good than with the price.
In conclusion, the correct answer is: A. a-1, b-2, c-3, d-4.