Answer: Balboa hacked his way across the Isthmus of Panama to discover the: D) Pacific Ocean.
Explanation: Hi, the answer is option D) Pacific Ocean.
Vasco de Nuñez de Balboa, A Spanish explorer, governor and conquistador, discovered the Pacific Ocean on september 29, 1513, while traveling across the Isthmus of Panama.
The main purpose of the expedition, as far as he was concerned, was the search for gold-rich kingdoms.
Balboa arrived back in Spain on January 19, 1514 with a treasure in cotton goods, more than 100,000 castellanos worth of gold and pearls aplenty.