The method will best help determine whether or not a secondary source's conclusion is valid is comparing the conclusion with several other sources. Thus, option (c) is correct.
What is secondary source's?
The term “secondary sources” refers to observation, evaluation, and also analyzing of data such as historical events, journals, articles, and many phenomena, typically using primary sources in the process. Secondary sources include books, newspapers, and magazines, etc.
The secondary sources are to measure if a conclusion is valid or not, and to check it by comparing the conclusion with a variety of other sources. Secondary sources are to be reliable, accurate, and concise in format. Secondary sources were used to compare facts, historical dates, and internet sources.
Therefore, option (c) is correct.
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