f the consumption of sugar does not change at all following a price increase from 49 cents per pound to 58 cents per pound, the demand for sugar is considered to be a. perfectly inelastic. b. perfectly elastic. c. unitary elastic. d. relatively inelastic.

correct option is a. perfectly inelastic

Explanation:

given data

price increase = 49 cents per pound to 58 cents per pound

solution

when price increasing 49 to 58 cents per pound so demand of a good is to be said as perfectly inelastic

because when the quantity demanded remain as same irrespective of change in the price of goods so that demand curve is to be vertical line here

like as some example are baby food and medicine etc.

so that correct option is a. perfectly inelastic