What gives the author's writing about the civil war authenticity?
a. bierce lived during the civil war time period.
b. bierce actually fought as a soldier during the civil war.
c. most of bierce's other writing is set during the civil war time period.
d. bierce studied the civil war closely so that his writing would be accurate.

the answer is d my man/woman the first passage is real the second is a setting.

whats the question you didnt post a question

explanation:

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the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).