What happened to the population of Breckenridge, Texas? A. The discovery of oil at Breckenridge swelled its population, then ten years later the town's population went down.

B. The discovery of oil at Beaumont caused many citizens from Breckenridge to abandon the town.

C. The discovery of oil at Breckenridge caused an environmental hazard that forced people to abandon the city.

D. This discovery of oil at Breckenridge swelled its population which caused it to remain one of Texas's largest cities.