The old political party machine used to assign voters to specific regions in order to influence elections. Voter registration could prevent this action.
Voter registration also called enrollment is the requirement that a person otherwise eligible to vote register (or enroll) on an electoral roll before they will be entitled or permitted to vote. Such enrollment may be automatic or may require application being made by the eligible voter. The rules governing registration vary between jurisdictions.
 
        
                    
             
        
        
        
Answer:
Explanation below
Explanation:
It should be understood that sub-sahara African countries are the countries that are found below the sahara region. And some of them are Gambia, Ghana, Benin,Burkina Faso, Eritrea, Nigeria and so on.
The incidence of having no access to safe drinking water has brought a lot of problems to this region. For example, most of their citizens are exposed to epidemic of diseases or infections which are water borne such as cholera, typhoid among others. And this has made their government to divert the money which can be used for other developmental projects in treating those infected. Also making use of those money to provide safe drinking water for them.
 
        
             
        
        
        
Out of the choices, the one that is NOT a role of the president of the state is the fourth choice. The president is not the chief justice of the supreme Court. Other persons are appointed in the position which is subjected to the approval of the president and other members of the court. 
        
                    
             
        
        
        
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They wanted to open a new land for american farmers