Example should be used when you want to make abstract ideas more concrete, and can be both real and hypothetical.
The correct answers are D and E.
In "The Immigrant Contribution," Kennedy stated that, even though people migrate to the United States for a wide variety of reasons, he discovered that nearly all of them share a hope to gain personal and economic freedom.
The indefinite article is the word a<span> (or </span>an when it helps pronunciation<span>). It is used before a noun to describe it as something non-specific.</span>
