What is the difference between short run and long run economicsb​

Explanation:

In macroeconomics, the short run is generally defined as the time horizon over which the wages and prices of other inputs to production are "sticky," or inflexible, and the long run is defined as the period of time over which these input prices have time to adjust.

answer; i do believe its (b) 12.5 years of age;

which sentences ? that question is incomplete