More people were killed than in any previous war :) you're welcome!
Postclassical. The classical era was antiquity which ended with the fall of Rome. Post means after so postclassical is after the fall of Rome which is the same as medieval.
7:59 am – American Airlines Flight 11, a Boeing 767 with 92 people aboard, takes off from Boston’s Logan International Airport en route to Los Angeles.
I think it’s d I’m pretty sure it’s d but I may be wrong
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.