The average income level, as measured by the per capita GDP, has increased by 28% in Country X. Which of the following is most likely to happen in the market for denims, a normal good, in Country X?

The average income level, as measured by the per capita GDP, has increased by 28% in Country X. Which of the following is most likely to happen in the market for denims, a normal good, in Country X?

The cost of producing denims will fall.
Consumers will expect the price of denims to remain the same in the future.
The demand for substitutes for denims will increase.
The demand curve for denims will shift to the right.