I believe A and C, but not completely sure.
i think its c becauseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Gilded age, as Mark Twain described it, was the period between 1876 and 1900 marked by rapid economic growth, where industry and work were dominant.
The Inventions of that era changed America.
In 1876 Alexander Graham Bell invented the telephone.
This invention helped create new jobs, especially for women who started working as switchboard operators.
It sorta started at the Munich Conference, when Hitler demanded the Sudetenland, and the democratic powers gave it to him, to try to save Europe from war. Then Hitler took the Rhineland, a demilitarized zone between Germany and France, they did nothing. Then Hitler invaded Poland, and after plenty of delay (known as the Sitzkrieg, a play on words off of the German strategy of Blitzkrieg), they finally declared war on Germany.