How might the economic situation of a country contribute to the popularity of drinking tap water that comes from treated wastewater?

Two key factors are involved in people accepting the drinking of tap water that comes from the treated wastewater:

1. Economic strength of the country: The country that has the wealth to develop and use technologies that can treat and purify the wastewater to make it available for drinking will make it possible for the people to accept it. The country may subsidise this kind of water to increase its use and popularity among its citizens.

2. Social acceptance: People should understand that they are drinking pure water and not wastewater. The change in mentality of people will promote its consumption.

i believe the answer is a or 1

the answer for this question would be d. glaciers