单项选择题
A.maintain strong ties with the British Empire B.fight for more territory for his country C.found the Republican party D.guarantee the status of new states
A.He had a broad vision of his country's future. B.He put the interests of Virginia ahead of those of the Union. C.He ignored the advice of people who settled the western region. D.He was one of the first government officials to travel in the western United States.
A.Increased pollution of the seas. B.Hunting. C.Insufficient supply of food. D.Disease.