Now that you've come up with a profit-maximization strategy, you want to make sure that you protect your monopoly for as long as possible. Your team provides you with some options to block competitors from entering the market. Rank them in terms of how effective they may be. Drag the options to a box labeled 'Most to Least Effective Options' in correct order and click Submit.

Try to control vital inputs to the hydro-engine, such as the metals used to construct it.

Continue to protect existing patents, trade secrets, and trademarks for the Hydro-gine.

Lobby the government to increase licensing fees and regulations for new hydro-powered engine technologies.