Which of the following sources is the most likely to contain a problematic bias?

a. a textbook about julius caesar written thousands of years after he died
b. a letter describing a major battle written by a soldier who is not a good writer
c. a biography of a presidential candidate written by the candidate's main opponent
d. a chart showing historical trends in the u. s. stock market written by a french citizen

The correct answer is C) A biography of a presidential candidate written by the candidate's main opponent.

The source that is the most likely to contain a problematic bias is "A biography of a presidential candidate written by the candidate's main opponent."

The rival candidate could find hard to maintain objectivity when writing the biography because he was his political rival and it is probable that he could have some resentments and differences that could bias the information of the book. It would be hard for him to write objectively and readers should read the information carefully, knowing that what is expressed in the biography could be biased and needed other sources to confirm its validity.

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although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.