What is the theme that sets the modern era apart from previous time periods?

Your answer would be D

Explanation:

The industrialization era was  in the late 1800s early 1900s

there has only been 12 presidents. the 12th president is/was moon jae-in

answer: born in saint-dié, in the vosges department, france, he studied law, and was called to the bar at paris in 1854,[2] but soon went into politics, contributing to various newspapers, particularly to le temps. he attacked the second french empire with great violence, directing his opposition especially against baron haussmann, prefect of the seine department. a series of his articles in le temps was later republished as the fantastic tales of haussmannlaxupa (1868).[2]

explanation: