Which of the standard classification markings appear at the bottom of the first page and provides information regarding who classified the document, the reason for classification, downgrading instructions, and the declassification date?

The correct answer to the following question will be "Classification authority block ".

Explanation:

A section or a block of a classification authority (classification authority block) outlining who categorized the knowledge or details why and how often longer the evidence will remain confidential.

all cities have a governor

all cities are in states or provnies then country

all cities have people

difference

some are rich

some are poor

some are average

i believe your answer is mountains.