Answer:
option (d) $1,000 billion
Step-by-step explanation:
Data provided in the question:
Gross domestic product = $3,500 billion
Consumption expenditure = $2,100 billion
Government expenditure = $400 billion
Investment = $800 billion
Net exports = $200 billion
Now,
National savings
= GDP - (Consumption expenditure + Government consumption)
= $3,500 billion - ( $2,100 billion + $400 billion )
= $1,000 billion
Hence,
The answer is option (d) $1,000 billion