Which of the following events occurred earliest in oil history?

• A. 1854 kerosene patent
• B. 1859 first Pennsylvania oil well
• C. 1947 Kerr-McGee oil strike
• D. 1950 Tapline completion

Answer: (A)

Understanding how the oil industry developed over time helps you see why this event comes first. The 1854 kerosene patent marks an early, practical use of petroleum by turning it into kerosene for lamps, a transformation that spurred interest in refining and distributing petroleum. This occurs well before the first successful oil well in Pennsylvania in 1859, which marks the start of crude oil production as a commercial activity. The later events—an oil strike in 1947 and a major pipeline completion in 1950—happen many decades after the initial shift from using petroleum to producing it on a larger scale. So, the 1854 kerosene patent is the earliest milestone among these.