Final answer:
Broker Janna was most likely accused of price fixing, which is a violation of antitrust laws that prohibit agreements between firms to control prices or divide markets.
Step-by-step explanation:
Broker Janna, accused of violating antitrust laws, was MOST likely accused of price fixing. Antitrust laws, administered by the Federal Trade Commission and the U.S. Department of Justice, are designed to prevent unfair competition, deceptive practices, and anticompetitive behavior. Among the illegal activities under antitrust laws are agreements between firms to fix prices or output, rig bids, or divide markets by allocating customers, suppliers, territories, or lines of commerce.