Concept:A consumer’s ranking of preferences is shown by indifference curves; an indifference map arranges these curves from lower to higher satisfaction.
Explanation:An indifference curve joins bundles of two goods that give the consumer the same level of satisfaction.
Therefore, the consumer is indifferent between bundles on the same curve.
An indifference map is a set of many indifference curves.
On this map, bundles on a higher curve are preferred to bundles on a lower curve.
So the indifference map gives information that ranks consumer preferences.
A scale of preference simply arranges wants, not consumption bundles.
Demand and supply schedules only show quantity responses to price, not preference ranking.
Answer:B. Indifference map.