Which era is credited with causing such changes as improving workplace conditions food safety housing standards and passage of the 16th 17th 18th and 19th amendments

The Progressive Era is credited with causing such changes as improving workplace conditions, food safety, housing standards, and the passing of the 16th 17th 18th and 19th Amendments.

physical maps

explanation:

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#2 the answer is d

#3 the answer is a

#4 the answer is b