Concept:Consumer equilibrium refers to the condition where a consumer gets the highest possible satisfaction from the available income.Explanation:A consumer is said to be in equilibrium when he allocates his limited income among goods and services in a way that maximizes his total satisfaction.This happens when the consumer balances his spending so that no further change can increase his level of satisfaction.The condition is based on the consumer fully using his income to get the greatest utility.Therefore, the consumer is in equilibrium when he maximizes his satisfaction from spending his income.Answer:B. he maximizes his satisfaction from spending his income