The answer to this question is 1, 2, and 4.
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Early settlers experienced challenges such as,attacks from American Indians and crop failure leading to starvation.
The settlers were able to overcome starvation by introducing corn farming in addition to tobacco farming. One of the major reasons why farmers had faced starvation was because the spent most of the time farming tobacco. in addition, Indians were very hostile,a problem that was resolved by increasing numbers of settlers and living together.
All Aztec<span> priests were religious leaders. ... But if the </span>Aztecs<span> ran out of captured people to sacrifice, or in times of great despair such as famine, they sacrificed </span>their <span>own people. The </span>Aztecs<span> built temples to </span>honor their gods<span>.</span>
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.