Answer:
C. technology
Step-by-step explanation:
Modern technology allowed drilling to be done at an even deeper level. A company from Tulsa, Helmerich and Payne, designed what’s called a FlexRig that uses computer technology for deep drilling. The Lone Star Bertha Rogers in Beckham County is the current record holder for the deepest producing well at 31,441 feet; that's almost forty times the tallest building in Oklahoma--the Devon Energy Center. It was completed in 1974. The major petroleum companies have spent large sums of money on the technology needed to drill at these depths to reach the natural gas deposits.
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