❀an object or type of material that allows the flow of charge (electrical current) in one or more directions.❀
The answer is D: both B and C.
This is correct because they are the title of a book chapter.
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Answer: There is no official language of the United States, according to the U.S. government. While almost every language in the world is spoken in the United States, the most frequently spoken non-English languages are Spanish, Chinese, French and German.
