In economics, the short run for a firm is A. usually eight months, but it depends on the accounting laws of each country. B. the time frame in which the firm can change the amounts of all inputs of production comma but not its technology. C. the time frame in which the firm can change the amounts of some comma but not all comma inputs of production. D. a period of time that starts on January 1 and ends on December 31 of possibly another year. E. the time frame in which the firm can change