Answer: Charlemagne's crowning made the Byzantine Emperor redundant, and relations between the East and the West deteriorated until a formal split occurred in 1054. The Eastern Church became the Greek Orthodox Church by severing all ties with Rome and the Roman Catholic Church — from the pope to the Holy Roman Emperor on down.
Explanation:
"A<span>s a refueling station for U.S. ships traveling to the Philippines" would be the best option from the list since Guam was only captured in the 20th century, which put the US into two world wars with reach into the Pacific.</span>