What medical problem did the advertisers of the first vibrators promise to solve? A chest congestion B back pain C hysteria D headaches

C. Hysteria.In the late 19th and early 20th centuries, vibrators were marketed to physicians as a treatment for "female hysteria," a catch-all term for a wide range of symptoms, often related to anxiety, depression, or sexual frustration. Doctors would manually stimulate patients to achieve "hysterical paroxysm" (what we would now recognize as orgasm), which was considered a therapeutic treatment. The vibrator was seen as a way to speed up this process.