Traditional gender roles were challenged in the 1920s by

Women wearing their hair short and smoking in public

Women serving in combat units in the military

Women's advocacy for looser divorce laws

Women serving in leadership positions in major corporations

Answer: Women wearing their hair short and smoking in public

Explanation: Young women with short hairstyles, cigarettes dangling from their painted lips, dancing to a live jazz band, explored new-found freedoms. No cultural symbol of the 1920s is more recognizable than the flapper. A young woman with a short "bob" hairstyle, cigarette dangling from her painted lips, dancing to a live jazz band. Flappers romped through the Roaring Twenties, enjoying the new freedoms ushered in by the end of the First World War and the dawn of a new era of prosperity, urbanism and consumerism, furthermore, the passage of the 19th Amendment, which finally gave women the vote. Women also joined the workforce in increasing numbers, participated actively in the nation's new mass consumer culture, and enjoyed more freedom in their personal lives.