Answer: Option C decrease; decrease
Step-by-step explanation:
When the income tax rate increases the people would have to spend more on paying taxes which reduces their income eventually. When the income is reduced the demand will also decrease and this in turn would decrease the supply of the goods.
The aggregate demand and supply curve will also shift to the left. The economic growth of the country will also slow down when the aggregate demand and aggregate supply decrease. This is due to the decreased consumer spending in the country.