Consider a country that has a trade deficit of $200 billion (net exports is - $200), private domestic savings of $500 billion, a government deficit of $200 billion, and private domestic investment of $500 billion. To reduce the $200 billion trade deficit by $100 billion, by how much does private domestic savings have to increase? [Hint: apply the investment-saving relationship.]

Group of answer choices

$100 billion

$120 billion

$200 billion

$150 billion