Final answer:
Portugal initiated the era of Atlantic exploration with Prince Henry the Navigator's leadership in the 15th century, seeking new trade routes and spreading Christianity. Breen's initial flight overseas for P and G e) In 2008 to Portugal.
Step-by-step explanation:
The question posed by the student pertains to the era of Atlantic exploration, specifically asking which country was the initiator of this significant period in human history. The era of Atlantic exploration is marked by maritime ventures by European nations, seeking new trade routes and territories, starting in the 15th century.
Portugal, under the leadership of Prince Henry the Navigator, was pioneering in Atlantic exploration. Initiating their long maritime ventures in the early 15th century, the Portuguese sought to find a sea route to the spice markets of the East, establish trade in gold and other goods, and spread Christianity. Portugal's explorations were significant in mapping the coast of Africa and eventually leading to the discovery of a sea route to India by Vasco da Gama in 1498. The correct answer to the student's question is D - Portugal.