Answer: Option (b) is correct.
Step-by-step explanation:
Correct Option: Tax changes would have a weaker multiplier effect.
If there is a tax cut by the government, it is generally results in higher aggregate demand. But here, the U.S. consumers save most of the tax cut which means that tax changes would have a weaker multiplier effect as compared to the government spending changes.
This is due to the saving component because people are not demanding for the goods as much as they demanding for the goods when the tax cut is not saved.
Therefore, tax cut would have a weaker multiplier effect as compared to government spending changes.