Utilize the input text as a context reference, choose the right relationship between 'Carlos Lopes' and 'United Nations' from the options.
Options: director/manager, creator, employer, owned by

Dr. Dlamini Zuma and Carlos Lopes told the new AfDB President when the three met in New York, USA, on 24 September 2015, in the margins of the 70th Session of the United Nations General Assembly meeting.
employer