Answer:
The economic principle is "people usually exploit opportunities to make themselves better off".
Explanation:
Here, the health club is offering a free one-year membership for the person who attends the most yoga classes in March.
So, there is an opportunity for every individual to get a free one year membership. <em>So, more and more people will try to attend more yoga classes in order to obtain free membership for one complete year. </em>This choice will be made by most of the individuals because they want to get rid of paying fee every month. Hence, <em><u>this will tend every individual to grab and exploit that opportunity to make themselves better off.</u></em>
Thus, the increase in people attending yoga classes is based on the economic principle "people usually exploit opportunities to make themselves better off".
Answer: Best prospects list
Explanation: The best prospects list is usually issued to potential exporters by the International Trade Organization which serves functions such as facilitating trade operations between countries by eliminating several trading issues such as negotiating and reducing trade tariff, regulating restrictive policies and also providing useful information necessary for successful trading to traders.
The provision of best prospects list offers firsthand information to potential traders about available and certified markets and distributor information which could facilitate ease of trading.