Plz help.

Examine this list of events that took place in china during the 20th century. which event or events could possibly have been a cause of the great leap forward? a. i only b. i, iii, and iv c. i and iii d. iii and iv

How did the g.i bill affect colleges? a. it increased demand for teachers b. it increased demand for support workers on campuses. c. it increased demand for construction on campuses d. all of the above

"which is one reason southern states were generally opposed to the ratification of the constitution? "