Final answer:
The heavily wired machine that supplied electrical current to metal rods around which hair strands were wrapped was invented by d) Karl Nessler.
Step-by-step explanation:
Karl Nessler, a German hairdresser, invented the first successful permanent wave machine in 1905. His creation involved a complex system of electrical wiring that supplied current to metal rods used for curling hair. This invention revolutionized the beauty industry by offering a method for creating long-lasting curls. Nessler's machine was a breakthrough, allowing people to achieve permanent waves without the need for constant heat application or cumbersome procedures.
Despite initial skepticism and challenges, Nessler's invention laid the foundation for modern-day hair perming techniques. His innovation paved the way for subsequent developments in hairstyling technology, influencing how people approached hairdressing and beauty treatments for decades to come.
Correct Answer: d) Karl Nessler