Answer
The cost of pair of of warships purchased by Malaysia is safe drinking water for 5 million people.
Work Step by Step
The opportunity cost of is what you sacrifice in order to get something else. There is a trade-off for every decision made. For example, in 1992, Malaysia bought 2 warships. With the money they spent on the 2 warships, the country could have built a system to provide safe drinking water for 5 million people. This water system is the opportunity cost for the 2 warships.
