How do historians make sure that they do not inject their own biases into their work?

Review the image below. which answer best describes how the artist depicts the people in this poster? the woman is not prepared while her husband is in control. the woman is upset about leaving her children, but her children are happy. the woman is prepared to leave, but her husband is worried. the woman, her husband, and her children are all angry about the situation.

Describe the technology advancements that lead to explorers being able to sail great distances. [[ps: doesn't explain where. i am only speculating it's in europe.

What happened as a result of the colonial victory at saratoga