EXPLANATION:The language of origin of the term 'Nzadi o Nzere' cannot be determined from the GIVEN paragraph and hence option 2 is incorrect.As there is no hint of any Portuguese intervention in the paragraph, the STATEMENT in option 3 cannot be inferred and hence is incorrect.It is given that Mobuto was a dictator of Congo and not Portuguese and hence the statement in option 4 cannot be inferred. Despite the change in name, the new name Zaire STILL has Portuguese origin and hence it can be inferred that Mobuto was not completely successful in his attempt to Africanise the name of his country.Hence option 1 is the correct answer.