Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. Many species, including white-crowns, use a dueling technique to spread the practice of countersinging to other males of the species. B. A young white-crown male uses countersinging to learn the songs of nearby males by repeatedly practicing them. C. A young white-crown male engages in countersinging with a nearby male in order to assert its continuing presence in its territory. D. Young white-crown males, much like young children, are competitive.