Final answer:
The key post-WWII fashion game-changer was the introduction of synthetic fabrics, which drastically transformed the accessibility and function of clothing, aligning with the newfound sense of autonomy women experienced during the war.
Step-by-step explanation:
The post-WWII fashion game-changer most accurately corresponds to option c) The introduction of synthetic fabrics. After the Second World War, there was a surge in technological advancements and societal changes that affected the world of fashion. The manufacturing industry, which had expanded during the war, turned to peacetime production, including the development of new, synthetic materials for everyday use. Women, having gained a sense of autonomy and confidence through their wartime roles, embraced these new textiles, which were often more affordable and practical than pre-war options.
Additionally, the desire for more comfortable, less constricting clothing rose, and fashion evolved to meet these needs. The shift towards simpler, more functional clothing was significant, and the availability of synthetic fabrics played a crucial role in the transformation of post-war fashion.