The correct option is D A Northwest Passage to the Pacific and Asia
Balboa's sighting of the Pacific Ocean and Magellan's voyage around the tip of South America motivated other European explorers to seek, a Northwest Passage to the Pacific and Asia. In September 1513, Balboa led an expedition of some 190 Spaniards and a number of Indians southward across the Isthmus of Panama. Balboa climbed a mountain peak and sighted the Pacific Ocean, which the Spaniards called the Mar del Sur (South Sea).