What was the main source of conflict at the Constitutional Convention? 1. how to abolish slavery
2. eliminating tariffs and other trade barriers
3. federal versus state power
4. the official language of the country

3) Federal verses State power

Explanation:

The Constitutional Convention was to decide whether the federal government or the state government should have more power.

when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.