When a rise in the price of a product does not change the total revenue, what can be inferred about the demand for that product?

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All of the above statements are trueDemand is not sensitive to price changesDemand has unitary price elasticityDemand is highly responsive to price variationsDemand is perfectly inelastic

Explanation

If total revenue remains unchanged despite a price increase, it indicates that the percentage change in quantity demanded exactly offsets the price change. This situation corresponds to unitary price elasticity of demand.