The correct answer is B) entanglement.
Magellan lost the favor of the king of Portugal when he became involved in a political entanglement.
Ferdinand Magellan (1480-1521) was a Portuguese explorer and famous navigator that receive the sponsorship of King Charles V to find new routes to the Indias and in a single exploration trip, he circumnavigated planet Earth. His work was affected because he was falsy accused of illegal trading with the Moors, and that made the king lose confidence in Magellan. Years later, Magellan was killed in a battle in the Philippines.