The United States, after sighing their Treaty with Panama, retained the right to defend the Panama Canal at any given time after the Canal was handed over to Panama.
Barry turned down the offer to play MC to the Beatle's concert that was set to happen in Milwaukee because there was no pay. He claimed that other musical groups paid him to play MC. When his musical director told him to accept the job, he called back.
In modern society, when we refer to the division of labor, we are generally talking about "<span>c. All the jobs people do are connected to other jobs," since this allows for job specialization that helps productivity. </span>