The merging of national markets that have historically been distinct and separate is the process of.

The federal reserve took an expansionary approach during the crisis. this was done by expanding the money supply and boosting liquidity. this can be seen in the fed's actions of lending to banks, purchasing securities, and lowering the federal funds rate in order to lower overall interest rates. the fed's goal was to increase consumer spending and overall liquidity within the system, and they pursued this by expanding the supply of liquid money.

Ithink its opportunity cost but not sure hope it .

To be honest, here's what i think. i think the answer is (and i'm not exactly sure), that it is, both personal and household income.