The third answer is correct
In this book, Jonathan Kozol wrote an ethnography of public schools in Chicago and its suburbs. Kozol argued that, because schools were funded by local property taxes, children in poor neighborhoods were necessarily trapped in poor schools. This system reinforces inequality. He also records the many differences between "poor" and "rich" schools," which included the difference in funding in arts and music and the number of foreign language teachers, nurses, librarians and psychologists.
Answer: The United Kingdom
Explanation: Following a June 2016 referendum, in which 51.9% of participating voters voted to leave, the UK government formally announced the country's withdrawal in March 2017, starting a two-year process that was due to conclude with the UK withdrawing on 29 March 2019.
He should have multiple bottles of different types of lake water or stream water , run them through the water filter and then test each result with pH paper, as pH paper will tell if it's safe or not safe to drink