Which of these is a complete sentence? A. Although the weather is sometimes warm in the early March. B. Forecasters predicted six more weeks of winter this year. C. The old saying, "In like a lion, out like a lamb".

The given question has complete sentence in the option (B): "Forecasters predicted six more weeks of winter this year."What is a complete sentence?A sentence is considered to be full when it has a subject, a verb, and a complete thought. The noun or pronoun that either performs the action of the sentence or receives its action is referred to as the subject in a sentence. A sentence's verb determines how it will be said. A subject and a verb are necessary for a complete sentence. A whole statement can be written in as little as two words, as in the following example: I am. A sentence that lacks a subject, a verb, or both is referred to as a sentence fragment or an unfinished sentence. At least one subject and one predicate, which make up an independent clause, must be present in every complete sentence.Hence, option (B) is the complete sentence.Check out the link below to learn more about complete sentences;https://brainly.com/question/1036691 #SPJ2

B is a complete sentence.A, although it has a complete thought, it has "although," so unless you place a dependent clause at the end, it is not a sentence.C is missing a verb.