Answer is D!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
These researchers are suffering from observer bias.
Explanation:
Observer bias is also known as <em>research bias</em> and it is the tendency an individual has to <em>see what he/she wants or expects to see</em>. The researcher allows his/her expectations about what will happen to <em>affect the study's results</em> because one's subjectivity comes into play, not really being objective.
Advances were made in medicine and technology
False. To find more information I recommend reading your lesson .
It should be 2 (Christopher Columbus sets out on his first voyage-1493), 3 (The Muscovy company is established-1551), 4 (The Spanish established their first settlement in North America-1565), and 1 (The French Established a fur trade in Canada-1608)