The D-Day invasion in June 1944 was important to the outcome of World War II because it Opened a new Allied front in Europe
Avoided use of the atomic bomb against civilian targets
Forced Italy to surrender
Stopped Soviet advances in eastern Europe

Opened a new Allied front in the Europe

Explanation:

There was only one front after the fall of France which were the Soviet. Soon after another front was created in Italy, where Italy negotiated for peace meaning another front was created. Then the success of the D-day, landing allowed for a 3rd front to open up, which spread the German soldiers very thin.

Soviet was a de facto ally of the Entente so it cannot be the fourth one. Italy only surrendered because the war was growing unpopular in Italy and Benito was toppled from power. They also surrendered as the Entente had got a holding of Sicily so it cannot be the third one. It cannot be the second one, as I am pretty sure that the Luftwaffe would have prevented this from ever happening

the assassination of president lincoln was just one part of a larger plot to decapitate the federal government of the u.s. after the civil war. the first reaction to lincoln’s death was disbelief. then it quickly changed to grief. abraham lincoln’s death created an outpouring of grief from citizens in both the north and the south.

explanation:

lincoln was the first u.s. president to be assassinated. president abraham lincoln, america’s civil war leader, was assassinated just five days after confederate general robert e. lee surrendered his army at appomattox court house, ending the four-year war between the states. on the evening of april 14, 1865, lincoln was attending a performance of our american cousin at ford’s theatre in washington, d.c. john wilkes booth – a 26-year old actor, confederate sympathizer, and white supremacist – slipped into the presidential box and shot lincoln in the head. john wilkes booth and his conspirators had initially planned to kidnap lincoln to save the confederate states. but as the confederacy faltered, booth’s thoughts turned to murder. booth may have decided to act on his hatred after lincoln endorsed giving the right to vote to african-american men who had served in the union army.