Your answer is: The Gilded Age, assuming you meant 1865 through 1900.
The “Roaring 20s” have nothing to do with anything before 1900, and refer to the decade of 1920, so we can rule this one out. The “Middle Ages” refer to the 5th to 15th century, ruling out this option, as well.
The “Golden Age” and the “Gilded Age” sound similar, refers to around 500 to 300 BC in Greece, also ruling this option out. We’re only left with one option now, this being the “Gilded Age.”