I need help with this. Please!!

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

Review of module 5 history dba history

Before the civil war, the south’s economy was based on enslaved labor. large cities. immigrant workers. factories.