Complete the phrase '[blank] est cēlāre [blank]' with the correct word.

The phrase '[blank] est cēlāre [blank]' includes the Latin verb 'cēlāre,' which means 'to conceal.' The correct use of the terms in this case involves understanding the grammatical cases and forms of the nouns used in Latin.

In the correct answer, 'ars' is a noun in the nominative case meaning 'art' or 'skill,' which is the subject of the sentence, and 'artem' is the accusative singular form of the same noun, meaning 'art.' In Latin, the structure 'Subject is to conceal the object' follows the format of using nominative for the subject and accusative for the direct object.

When combined, 'ars est cēlāre artem' translates to 'art is to conceal art,' which preserves a logical and grammatical structure. The use of 'ars' and 'artem' allows the phrase to maintain the proper contextual meaning, making it the best choice among the options provided.