Flexible exchange rate: higher demand for US dollar â†' exports:

A leftward shift in both SRAS and LRAS would indicate a decrease in overall supply, which contradicts the effects of technological advancements. Such a shift typically occurs in response to adverse events, like natural disasters or increased production costs, rather than improvements in technology.

This choice inaccurately suggests that short-run aggregate supply decreases while long-run aggregate supply increases. A leftward shift in SRAS would indicate a reduction in supply, which is inconsistent with the effects of technological advancements that typically enhance short-run production capabilities.

Claiming no change implies that technological advancements have no effect on supply, which is incorrect. Such advancements inherently alter production capabilities, leading to a shift in both SRAS and LRAS. This choice overlooks the fundamental economic principle that productivity improvements result in increased supply.