Which sentence has an infinitive or infinitive phrase that functions as a direct object?

Question

Because of the Great Depression, these men needed to work.

Their first task was to build barracks and other permanent structures.

In 1933, legislation was passed to establish the Civilian Conservation Corps.

To see their work, visit the campgrounds in Death Valley.

Answer 1

The sentence that has an infinitive or infinitive phrase functioning as a direct object is:

Their first task was to build barracks and other permanent structures.

In this sentence, "to build barracks and other permanent structures" is the infinitive phrase that serves as the direct object of the verb "was."