Final Answer:
The excerpt "economic and political systems" from Franklin D. Roosevelt's "Four Freedoms" speech is a noun phrase. Option C is answer.
Step-by-step explanation:
In linguistic terms, a noun phrase consists of a noun and its modifiers. Analyzing the provided quotation, "economic and political systems" functions as a noun phrase as it encompasses a noun ("systems") along with adjectives ("economic" and "political") modifying and describing the nature of the systems.
Recognizing such linguistic structures is essential for understanding the grammatical intricacies of a sentence. Therefore, option C, "economic and political systems," correctly represents a noun phrase in the given context.
Option C is the answer.