Can somebody me with a rap about wwi?

Population growth during the gilded age was due in large part to unemployment among workers. an improved food supply. better health care. immigration to the united states.

An educatethe yuan dynasty was responsible for which of the following: i. improving the road system ii. increasing sea trade with india and south east asia. iii. extending the canal system iv. brutal warfare and ruthless killing of people in order to take over china. a. i & iii c. iv only b. ii only d. all of the above member of the government

Brainliestttme : ) what demographic changes occurred after world war ii?