I want to know the answer to the following question:
The development of what two types of exptertise established the core competencies on which the company was founded?
All the background I'm provided with is that "The development of technical and commercial expertise in all stages of this vertical integration, from the initial search for oil (exploration) through its harvesting (production), transportation, refining and finally trading and marketing established the core competencies on which the company was founded.". Is that enough to answer the question?
Answer: yes