Which sentence uses a comma to separate two indenpentent clauses
A sentence that uses a comma to separate two independent clauses is commonly called a comma splice. It is actually grammatically incorrect to use only a comma to join two independent clauses. Instead, a coordinating conjunction (such as "and," "but," "or," "nor," "so," "for," or "yet") should be used along with the comma to properly join the two independent clauses.
For example, a correct sentence using a comma to separate two independent clauses may look like this:
"I went for a walk in the park, and I saw a beautiful sunset."
In this sentence, the comma is used in conjunction with the coordinating conjunction "and" to join the independent clauses "I went for a walk in the park" and "I saw a beautiful sunset."