Apart of my test that I had to do it had the same question.
The answer is D to ensure future trade
N the late 19th century people like Teddy Roosevelt and Henry Cabot Lodge felt America should expand beyond its borders for all of the following reasons except "<span>b. as an extension of manifest destiny" since this mindset only applied to furthering US borders in the continental US. </span>
It decreased due to the fact that many jobs were opening in the urban areas so people left their farms and houses in rural areas to get a job in a bigger city.