Which statement best describes the central idea of the article?
The early days of drilling for oil were easy, but then the industry
struggled by growing too quickly.
The early days of drilling for oil were difficult, but now the industry is a
critical part of the economy.
The early days of drilling for oil were easy, but then the industry
struggled with environmental challenges.
The early days of drilling for oil were difficult, but now the technology
is directly responsible for creating the auto industry.