They are likely to be biased is the true statement about using secondary sources.
option: A
<u>Explanation:</u>
Secondary sources are considered to be the interpretations and evidence that we get from primary sources. These are basically are not even evidence, these are rather comments and discussion on the evidence on certain concepts or believes. Secondary sources come to picture when it is written after a fact with an advantage of hindsight. Essays on reviews, bibliographies, biographical works, commentaries, criticisms are some of the examples of the secondary sources.
Answer:
The U.S.'s foreign policy after WWI was to become isolationists. They said they would not supply any country with weapons.
The Western Front of World War I was opened in 1914 after the German Empire's army invaded Belgium and Luxembourg, so it gained military control of important industrial areas of France. The advance of the Empire underwent a dramatic turn after the first battle of the Marne, where the alliance between France and the United Kingdom defeated. Both sides -Aliados and Central Powers- settled in a sinuous line of fortified trenches, which extended from the North Sea to the Swiss border with France. That line remained static for most of the war.
The name given to this trade was the Triangular Slave Trade. I apologized for the extremly late and short answer. If you need more information, simply ask.
<span>B. it affected European arts and culture for thousands of years.</span>