Answer:
a. prevented businesses from fixing prices and limiting production
Explanation:
Anti-trust laws refer to laws that were established by the United States government to avoid that companies engage in practices that affect customers and the competition in the market, for example, when several companies establish prices for their benefit and when companies limit their production to maintain certain price. According to this, the answer is that anti-trust laws prevented businesses from fixing prices and limiting production.
The other options are not right because anti-trust laws are about maintaining a free competition in the market and avoid unethical behaviors from the companies which means that these laws don't allow companies to fix prices, limit production or reveal information from clients.
