Final answer:
Thomas Edison received more credit than Nikola Tesla due to his inventions' broader societal impact and his prolific career with numerous patents. However, it is important to acknowledge Tesla's contributions as well. Option a.
Step-by-step explanation:
Thomas Edison received more credit than Nikola Tesla due to several reasons. First, Edison's inventions, such as the electric light bulb, phonograph, and moving picture projector, had a broader societal impact. These inventions transformed the country and the world, revolutionizing how people lived and worked.
Second, Edison had a prolific career, registering 1,093 patents and running a world-famous laboratory called Menlo Park, which housed a rotating group of scientists. While it is unfair to overshadow Tesla's contributions, it is important to acknowledge the significant impact Edison had on society.