What idea did Columbus's voyage prove wrong? A The Earth is round.
B The Earth is flat.
C the Earth is the center of the universe.
D The Earth revolves around the Sun.

C:  The Earth is the center of the universe. HOPE THIS HELPED! :)

ww1 weapons: tank. tanks were used for the first time in the first world war at the battle of the somme. they were developed to cope with the conditions on the western front. the first tank was called 'little willie' and needed a crew of 3.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.