Which of the seven-subset companies retained the most power and what is the company name today?

• A. Standard Oil of California
• B. Standard Oil of New Jersey
• C. Standard Oil of Indiana
• D. Standard Oil of Ohio

Answer: (B)

The main idea here is how the Standard Oil breakup left one successor with the most staying power due to its large, integrated network. Among the seven resulting companies, Standard Oil of New Jersey built the largest refining capacity, distribution system, and market influence, which kept it ahead as the leading oil player even after the split. That dominant position persisted and the company eventually rebranded as Exxon, and later became ExxonMobil after a merger with Mobil. So the best answer is that the Standard Oil of New Jersey retained the most power, and its name today is Exxon (as part of ExxonMobil). The other spinoffs ended up as different brands (for example, California became Chevron, Indiana became Amoco, Ohio became Sohio), but the New Jersey line grew into Exxon.