Alaw passed in 1890 that encouraged competition in the marketplace, and still does, is the

The correct answer is the Sherman Antitrust Act (1890).

The Sherman Antitrust Act was a federal law that made monopolies or monopoly like practices illegal. A monopoly is a business or individual that controls an entire market. For example if only one company in the entire US made phones that would be considered a monopoly.

This law encourages competition because it ensures that there will be several different businesses that Americans can buy products from. This competition helps to keep prices low for the consumer.

Bis your correct answer