Upper Volta is the old name of:

Answer: Option C

Burkina Faso is a landlocked country in West Africa around 274,200 square kilometers in size. Formerly called the Republic of Upper Volta. Under the direction of Sankara, the country changed its name on August 4, 1984, from Upper Volta to Burkina Faso, which means "Land of Incorruptible People". The name Upper Volta indicated that the country contains the upper part of the Volta River.