Answer:
The correct option is $3.5 trillion
Step-by-step explanation:
National saving is what is left in an economy after having paid for consumption expenditure and taxes.
National saving=Income-Consumption-Taxes
Income here is the GDP of $12 trillion
Consumption is $8 trillion
Taxes is $0.5 trillion
National saving=$12 trillion-$8 trillion-$0.5 trillion
national saving=$3.5 trillion
$3.5 trillion left after taking taxes and consumption,invariably that is the national saving in the economy for that particular year
The government expenditure of $2 trillion is not relevant for the requirement in this question