I need help it’s a cause and effect problem for his can someone help? Correct answers get brainliest!

Which country was the last to join the allied powers? o great britain o france o united states o china

An addition to jews , a specific group that the nazis systematically killed during the holocaust was

Ihonestly don't know how to revise, like i'm struggling so much to remember things and i really don't know what to do at this rate. does anyone have any advice? especially with american history, i've got 5 topics in this section.