If the Government Gave a Tax Rebate to the People

If the government gave a tax rebate to the people but aggregate demand remained unchanged, the most likely reason is that

A) people saved all the additional money from the rebate in order to pay for future tax increases.
B) people spent all the additional money from the rebate.
C) the government spent the same amount as the total amount of the tax rebate.
D) the government financed the tax rebate through printing more money.