Answer:
The correct answer is D. The original mission given to Cabeza de Vaca when he left Spain was to discover a "fountain of youth".
Explanation:
On June 17, 1527, Alvar Nuñez Cabeza de Vaca departed from Sanlucar de Barrameda, Spain, heading to America, as treasurer and senior sheriff in the expedition led by Governor Panfilo de Narvaez, whose objective was the conquest of Florida and the search for the Fountain of Eternal Youth, between the Las Palmas River and the Cape of Florida. The expedition was composed of 600 men and five ships.