I think it is the last option S
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.
Contras. Part of the Iran Contra affair, where after congress decided to stop funding the anti-communist Contras in Nicaragua, Ronald Reagan and Oliver North illicitly sold arms to the Iranians, and used that money to fund the Contras, who were fighting the pro-communist Sandinistas.
I don't get the question but all I know is that for a pres. To win they need 270 electoral votes