Which One is the Best Way to Combine Two Clauses into One Complete Sentence?

Merging Two Clauses into One Sentence

I need to take a nap. The class is not over.

When combining two independent clauses into one complete sentence, it is important to use appropriate conjunctions or connectors to make the sentence clear and coherent.

A. I need to take a nap because the class is not over.

B. I need to take a nap since the class is not over.

C. I need to take a nap whenever the class is not over.

D. I need to take a nap although the class is not over.

Among the given options, the best way to write the two clauses as one complete sentence is option D. "I need to take a nap although the class is not over." This option correctly merges the two independent clauses while maintaining the logical connection between them.

Which is the BEST way to write the two clauses as one complete sentence? I need to take a nap. The class is not over.

D. I need to take a nap although the class is not over.