Final answer:
The principle that most helps justify the reasoning in the given scenario is that government-owned companies have the right to do whatever private businesses have the right to do.
Step-by-step explanation:
The principle that most helps justify the reasoning in the given scenario is (A) Government-owned companies have the right to do whatever private businesses have the right to do. The reasoning in the passage is that if a private gas company has the right to sell stoves and gas appliances, then a government-owned gas company also has the right to do so. This principle supports the argument that the government-owned gas company is within its rights to sell these products and compete with private merchants, even if it may hurt their businesses.