Answer:
C.This source is credible because it contains facts and information that are accurate.
Step-by-step explanation:
Given that it is true that British general John Burgoyne's participated at the Battles of Saratoga with armies of about 7,000 and has lost about a thousand armies, including his Aide-de-camp Sir Francis Clerke. And thereby later surrendered his entire army of about 6000.
Hence, the source is most accurate because "this source is credible because it contains facts and information that are accurate."