The DMV is issuing new driving licenses to people, men, and women under the age of 21.
Which of the following words or phrases are REDUNDANT in the sentence above?

The phrase "men and women" is included in the noun "people." While the word "new" is not necessary for the sentence to be correct, removing it would change the meaning of the sentence. The word "to" is a necessary preposition. If the phrase "the age" were removed, the sentence would have a redundant "of."