A normal good is one: a. whose amount demanded will increase as its price decreases. b. whose demand curve will shift leftward as incomes rise. c. whose amount demanded will increase as its price increases. d. for which the consumption varies directly with income

Option "D" is the correct answer to the following statement.

Explanation:

If the volume prepared by the manufacturer rises with the rise in customer revenue, the commodity is called normal goods, the same as if the quantity desired by the consumer fall with the decrease income of the consumer.

Normal goods directly vary with consumer income.

So, we say that the Elasticity of normal goods is always positive.