Answer:
Option (a) is correct.
Step-by-step explanation:
The consumption of macaroni-and-cheese dinners falls. A change in income level of the consumer is related with the demand for normal and inferior goods.
As we know that there is a positive relationship between the income of the consumer and the demand for normal goods. Hence, as the income of the falls then as a result the demand for normal goods (macaroni-and-cheese dinners) falls. Normal goods are generally have a positive income elasticity of demand.