The correct answer is C. Skiers called the record Snowfall incredible!
Step-by-step explanation:
In grammar, sentences generally contain a subject, a verb, and a complement. A complement is a word or a set of words that complement the meaning of a sentence especially by adding information about the main verb or action. Due to this, complements can act as adjectives, nouns or objects. In the case of an adjective as complements, these are words that modify or describe the action in a sentence and can be identified because they express attributes or features of it. Considering this, the sentence in which the underlined word complement a sentence as an adjective is "Skiers called the record Snowfall incredible!"because in this sentence the word "incredible" which is the word underlined completes the meaning of the main verb "called" by describing it or acting as an adjective.