What were the main issues that concerned labor unions 8n the 1800's

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

How conditions changed in the american south over the final decades of the 1800s for african americans. consider black politics, black voting, and the rise of segregation

Will have the greatest effect on human health. pollution in the a. troposphere b. stratosphere mesosphere d. thermosphere