When the majority of people are united by a common ethnicity, language, and culture, this is known as a(n) a. nation-state b. embassy c. nation d. country

The correct answer is C. When the majority of people are united by a common ethnicity, language, and culture, this is known as a nation.

Explanation:

In a broad sense, a nation is a historical-cultural community with a territory that it considers its own and that sees itself with a certain degree of consciousness differentiated from others. The modern sense of nation was born in the second half of the 18th century, both in its conception of "political nation", as a group of citizens in which the constituent sovereignty of the State resides, as in its conception as a human community defined by a specific and differenciated language, roots, history, traditions, culture, and geography.

the answer to your question is a because laws act as guidelines as to what is accepted in society. without it there would be conflicts between social groups and communities. it serves as a norm of conduct for citizens.