Please Help What does this online dictionary entry suggest about the etymology of the word theater?

theater
/'THēədər/
noun

1 a: a building or area for dramatic performances
b: a building or area for showing motion pictures
c: an outdoor structure for dramatic performances or spectacles in ancient Greece and Rome

A. The word changed from a noun to an adjective.
B. The word was introduced by the Vikings.
C. The word is Greek in origin.
D. The word's meaning has changed a lot over time..

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clerical work ensures that an office runs smoothly. it involves the day-to-day administrative tasks of an office, such as answering phones, scheduling appointments, sending faxes, and filing documents. office clerks and secretaries need to have particularly strong clerical skills.

explanation:

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there is a sequence and logical steps to give an answer of a trouble.

1) strategy is necessary to develop an project idea.

2) to study and know the environment where you are going to work ( ecosystem).

3)   the materials resources to built the ideas.

4) to give a priority order in the context that you study. in this case human needs.