Answer:
d. Private saving increases by less than $20 billion.
Explanation:
Because the interest rate has increased, investment and national saving decline and private saving increases. The increase in government borrowing reduces public saving. From the figure you can see that total loanable funds (and thus both investment and national saving) decline by less than $20 billion, while public saving declines by $20 billion and private saving rises by less than $20 billion.
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