13. In which of the following situations must national saving rise? a. Both domestic investment and net capital outflow increase. b. Domestic investment increases and net capital outflow decreases. c. Domestic investment decreases and net capital outflow increases. d. Both domestic investment and net capital outflow decrease.

13. In which of the following situations must national saving rise?
a. Both domestic investment and net capital outflow increase.
b. Domestic investment increases and net capital outflow decreases.
c. Domestic investment decreases and net capital outflow increases.
d. Both domestic investment and net capital outflow decrease.

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