Which of these BEST illustrates an effort made by the United States government to ensure fair competition in the marketplace? building roads and bridges restricting environmental pollution reducing speed limits on national highways enforcing antitrust legislation

## Step 1<br />The question is asking for the best example of an effort made by the United States government to ensure fair competition in the marketplace. The options provided are: building roads and bridges, restricting environmental pollution, reducing speed limits on national highways, and enforcing antitrust legislation.<br /><br />## Step 2<br />Building roads and bridges, restricting environmental pollution, and reducing speed limits on national highways are all actions that can improve the overall quality of life and the economy, but they do not directly address the issue of fair competition in the marketplace.<br /><br />## Step 3<br />Enforcing antitrust legislation, on the other hand, is a direct action taken by the government to ensure fair competition in the marketplace. Antitrust laws are designed to prevent monopolies and promote competition, which can lead to lower prices and better quality goods and services for consumers.