Final answer:
The early 20th century saw major shifts in beauty standards due to the discovery of vitamins and the influence of Hollywood stars, as well as the emergence of fashion magazines and formalized beauty education through beauty schools. Together, these factors heavily influenced societal views on beauty and personal appearance.
Step-by-step explanation:
The early 20th century was a time of significant developments that drastically changed America's ideas about beauty. Two of the major developments that transformed societal views on beauty during this period were C) the discovery of vitamins and the advent of Hollywood and D) the rise of fashion magazines and the establishment of beauty schools. The discovery of vitamins led to a greater understanding of health and nutrition, which naturally influenced beauty standards. At the same time, the burgeoning film industry in Hollywood created iconic stars whose appearance set new beauty ideals for American women. These film stars became the faces of beauty and glamour, widely disseminated through the growing media of movies and celebrity photographs.
The rise of fashion magazines played a crucial role in spreading new ideas about beauty by promoting the latest fashion trends and beauty tips. These magazines reached a wide audience and dictated the standards of beauty, which often included the make-up looks and hairstyles that were popular among Hollywood celebrities. Furthermore, the establishment of beauty schools made beauty and cosmetology a more structured field, leading to the professionalization of services such as hairdressing, makeup application, and skincare. Through these institutions, beauty became not just a concern of individual women but a burgeoning industry.
Overall, these developments contributed to a cultural shift where beauty and personal appearance took on a new significance, as both industries—the cinematic and the fashion world—collaborated to shape the American standard of beauty.