A canceled US Treasury check for the purchase of Alaska is an example of a primary source document.
C) primary source document.
Step-by-step explanation:
Primary source document is a type of document, recording, artifact or autobiography that provides trustable or direct evidence about the person, an event, object or work of art.
Eyewitness statement, statistical data, legal documents, audio and video recordings and written documents are considered as some of the primary sources.
During 1866, it is evident that the Russian government was ready to sell the territory of Alaska to the United States of America. U.S government was ready to pay the check for $7.2 million to the Russian Minister for purchasing Alaska.