The answer to this question B.
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No idea what primary research so i'm going to assume you mean primary source in which case it depends on the type of evidence, like if it's a personal account then that's a primary source but if it's someone telling of someone else's story it's not.
The Haymarket Riot (also known as the “Haymarket Incident” and “Haymarket Affair”) occurred on May 4, 1886, when a labor protest rally near Chicago’s Haymarket Square turned into a riot after someone threw a bomb at police.
At least eight people died as a result of the violence that day. Despite a lack of evidence against them, eight radical labor activists were convicted in connection with the bombing.
The Haymarket Riot was viewed as a setback for the organized labor movement in America, which was fighting for rights like the eight-hour workday. At the same time, many in the labor movement viewed the convicted men as martyrs.
Learn more about Haymarket Riots at
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The Battle of El Alamein showed that Hitler was giving too many orders to his leading general in that battle Erwin Rommel who was previously largely successful against the allied forces. Because he was constantly interfering and giving orders it was revelaed that he was osmewhat unskilled when it came to military tactics - C. At least compared to his generals.
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Modern computers are complex and so were old fashioned computers. Old fashion computers required a bunch of efforts to get to one thing where as modern computers take one click. But, modern computers also have many more websites and secret tricks. They can hold a lot more information than they could back in the day. Therefore, modern computers deserve the medal of complexity. :) brainliest pls?
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