Kaplan Nursing Entrance Exam Practice 2026 – Comprehensive Prep

An adverbial clause is specifically designed to provide additional information about a verb, adjective, or another adverb, focusing on circumstances such as time, place, reason, or condition. For example, in the sentence "I will call you when I arrive," the clause "when I arrive" explains the time of the action (calling). It can indicate when something happens, where it happens, why it happens, or under what conditions. This makes option B the most accurate choice, as it encapsulates the primary purpose of adverbial clauses in language.

The other options address different types of clauses or parts of speech. Modifying a noun points towards adjectival clauses or adjectives, which focus on describing nouns. Describing a verb's action generally pertains to adverbs, but without specifying the nuances of conditions, reasons, or timing as adverbial clauses do. Lastly, using a clause to replace an adjective does not align with the function of adverbial clauses, which are not used in place of adjectives but rather work alongside verbs and other modifiers to enrich the meaning of the sentence.