A complex sentence allows for which of the following?

A complex sentence is characterized by the combination of at least one independent clause and one or more dependent clauses. This structure allows for the expression of more elaborate ideas, as the independent clause can stand alone as a complete thought, while the dependent clause adds additional information that cannot stand alone. For example, in the sentence "Although it was raining, the children played outside," "Although it was raining" is a dependent clause that provides additional context to the independent clause "the children played outside."

In contrast, other options do not accurately reflect the definition of a complex sentence. Two or more independent clauses are a feature of compound sentences, and a complex sentence may have more than one subject or predicate due to the nature of its clauses. Thus, the accurate identification of a complex sentence is integral to understanding sentence structure and enhancing writing skills.