Answer:
The "Gilded Age" term came into use in the 1920s and 1930s and was derived from writer Mark Twain's and Charles Dudley Warner's 1873 novel The Gilded Age: A Tale of Today, which satirized an era of serious social problems masked by a thin gold gilding.
Step-by-step explanation:
Mark Twain called the late 19th century the "Gilded Age." By this, he meant that the period was glittering on the surface but corrupt underneath.