Which was not a feature of the post-civil war department store?
a. electricity
b. negotiation of prices
c. pneumatic tubes
d. telephones

In the Post-Civil War era, one could find many things in a department store but one thing they could not find was a. Electricity.

In the post civil-war era:

Electricity was not present at the time because it had not yet been modernized enough to allow for long distance transmission and not everyone had access to it.

In conclusion, option A is correct.

Find out more about the invention of the telephone at link.

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

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it should be a. song dynasty’s civil service examination system created an administrative bureaucracy manned by the landed aristocracy.