Pick which group of word below is a run-on sentence: A) Don't run around.

B) After the store don't run around. C) After the store.

None of them.

Why is it none of them? My answer is B.is it okay to choose as a run-on sentence?

Is there a choice D? None of them are truly a run-on sentence. B just needs a comma.

The run-on sentence is B) After the store don't run around.

To determine whether a sentence is a run-on sentence, we need to understand what a run-on sentence is. A run-on sentence occurs when two or more independent clauses (complete sentences) are joined together without proper punctuation or coordination.

In the given options, a run-on sentence is one that joins multiple independent clauses without any punctuation or coordination.

In option B) "After the store don't run around," we have two independent clauses: "After the store" and "don't run around." These two clauses are joined together without any punctuation or coordination, making it a run-on sentence.

Option A) "Don't run around" is not a run-on sentence because it is a complete sentence, not joined with any other clauses.

Option C) "After the store" is also not a run-on sentence since it consists of a single independent clause and is grammatically correct without joining any other clauses.

Therefore, the correct answer is B) After the store don't run around.