The statement that accurately describes a cause-effect relationship related to the birth of the oil industry in Texas is:
Gladys City Oil tried a new drilling technique that made it easier to drill into sand. This led to the discovery of a large oil gusher at Spindletop Hill.
This statement clearly establishes a cause (the new drilling technique) and an effect (the discovery of a large oil gusher), which played a significant role in the development of the oil industry in Texas.