Answer:
The correct answer is the fourth option: developing a thorough understanding of the company's external and internal environments.
Explanation:
To begin with, in order to understand that a company's strategy must be guided by thorough understanding of its external and internal environments it is necessary to understand that the system proposed is formed by several factors that influence it and therefore that a manager must study carefully those factors and that system in order to guide the company to a successful work and accomplish the goals by using a strategy that compresses all the information about those factors.