The correct answer is A. Using multiple sources to confirm a conclusion
Step-by-step explanation:
The word "corroboration" refers to the action of comparing information about some event or issue to support a certain idea or confirm it. Because of this, corroboration is widely used in relation to sources, especially when trying to understand or write about a subject, situation or issue. In this case, corroboration should be carried out by gathering multiple sources and comparing them in order to know which evidence or information are true and have been reported in multiple sources and in this way confirm a main idea or conclusion. Therefore, the statement that best defines the therm corroboration is using multiple sources to confirm a conclusion.