Choose the sentence in which the underlined word should be capitalized.

O On the day Luis went to the fair, the SUN was shining brightly.

O Guarding the entrance to the fairgrounds was a police OFFICER.

O He is known around town as CAPTAIN Jim.

O He lives in an old farmhouse out in the COUNTRY.

The sentence in which the underlined word should be capitalized is:

O He lives in an old farmhouse out in the COUNTRY.

To determine which word should be capitalized in the sentence, we need to identify a proper noun. A proper noun is a specific person, place, or thing, and it is always capitalized.

In this sentence, "COUNTRY" is a proper noun as it refers to a specific place. Therefore, "COUNTRY" should be capitalized.