Answer:
The correct answer is option C.
Explanation:
The government builds a water-treatment plant. Workers are hired to build the plant. These workers earn factor incomes. These incomes are spent on buying goods and services. This further increases output level. Â
This increase in the output level or aggregate demand because of an increase in government spending represents the multiplier effect. Here an increase in the government will cause a more than proportionate increase in output because of the multiplier effect.