Which three sentences correctly use parallel structure?

Why did the fighting go on after the armistice was signed

Which purposes of the constitution are found in the preamble? select the six correct answers. to provide for the common defense to form a more perfect union to promote the general welfare to secure the blessings of liberty to declare independence from britain to establish justice to ensure domestic tranquility

What were some effects in world war 1 in europe ? ( and only in europe)