Understanding the cultural habits of another nation, especially ______ containing as many different

Understanding the cultural habits of another nation, especially ______ containing as many different subcultures as the US, is a complex task. A. one B. that C. the one D. those

The correct answer is A. one.

In this sentence, we need a pronoun to refer back to the singular countable noun "nation" mentioned earlier ("another nation"). Let’s analyze the options:

D. those is plural and cannot replace the singular "nation," so it’s eliminated.

B. that is typically used in comparative structures (e.g., "The culture of France differs from that of Germany") and does not fit here, where we’re not comparing but generalizing about a type of nation.

C. the one implies specificity ("the specific nation"), but the sentence refers to a general category of nations ("another nation, especially [any] one containing..."), not a unique, previously mentioned nation.

A. one correctly functions as a singular pronoun to replace "nation," maintaining generality: "another nation, especially a nation (one) containing as many subcultures as the US."

Thus, "one" naturally extends the idea of "another nation" by introducing a characteristic (containing many subcultures) without unnecessary specificity.