1. Which of these is a compound sentence?

A. Although the weather is sometimes warm in early march.
B. Forecasters predicted six more weeks of winter this year.***
C. The old saying " in like a lion, out like a lamb".

"B" is a complete sentence, but not a compound sentence.

Please check your question to make sure you posted it correctly.

I meant complete sentence

Oh, good! Then you're correct!!

To determine which of these is a compound sentence, we need to understand the structure of a compound sentence. A compound sentence is a sentence that consists of two or more independent clauses, which can stand alone as complete sentences.

Let's break down each option to see if they meet this criteria:

A. Although the weather is sometimes warm in early March.
This option is not a compound sentence because it only contains one independent clause. It is a complex sentence, with a dependent clause ("Although the weather is sometimes warm in early March") and no independent clause.

B. Forecasters predicted six more weeks of winter this year.
This option is not a compound sentence either. It is a simple sentence, with one independent clause ("Forecasters predicted six more weeks of winter this year") that can stand alone.

C. The old saying "in like a lion, out like a lamb".
This option is also not a compound sentence. It is a simple sentence with one independent clause, similar to option B.

Therefore, the correct answer is none of the provided options. None of them represent a compound sentence.