Answer: (A) Antitrust law
Step-by-step explanation:
The antitrust law is the law that government imposed for increasing the competition in marketplace.
The antitrust law is basically promote the and also protect the level of competition in the market. It always ensure illegal business practices and the also proscribe the unlawful merges.
If the prices get lower in the geographical areas, it is one of the best example of explaining the antitrust law.
Therefore, Option (A) is correct.