Which company was a major producer of California oil fields in the 1890s besides Standard Oil?

• A. Union Oil
• B. Texaco
• C. Chevron
• D. Gulf Oil

Answer: (A)

In the 1890s, Standard Oil faced competition from strong regional producers in California, with Union Oil standing out as the major independent producer in the state. Union Oil built a significant presence by developing key California fields and establishing a distribution network that rivaled Standard Oil’s reach, making it the foremost non-Standard Oil producer in that era.

Texaco and Gulf Oil hadn’t been formed yet (they arose in the early 1900s), and Chevron’s lineage for California oil came through different corporate pathways later on, not as a leading producer in the 1890s. That’s why Union Oil is the best answer.