
Answer:
The correct answer is option a.
Explanation:
Price elasticity of demand measures the change in the quantity demanded of a commodity due to the change in its price. Â
The change in quantity demanded and price level affects the total revenue as the total revenue is the product of price and quantity demanded. Â
So when the price is elastic then a change in the price level will cause a greater change in quantity demanded and thus in revenue. Similarly, when demand is inelastic a change in the price level will cause a smaller change in quantity demanded and thus revenue.