The most effective revision for the given run-on sentence would be:
"The two of us were okay, even though the front of our car was totally shattered and our luggage lay all over the road."
In this revised sentence, the conjunction "even though" is used to connect the two main clauses, providing a clear contrast between the damage to the car and the well-being of the individuals. By placing "the two of us were okay" at the beginning of the sentence, it helps to emphasize the main idea and avoid confusion. Additionally, the use of proper punctuation (comma) helps to separate the clauses and improve readability.
The other options provided in the response choices either separate the sentence into two incomplete thoughts or introduce unnecessary punctuation marks that disrupt the flow of the sentence.
It's important to revise run-on sentences to ensure clarity and coherence in writing. Run-on sentences occur when two or more independent clauses are incorrectly joined without appropriate punctuation or coordinating conjunctions. By revising the sentence to include appropriate punctuation and conjunctions, we can effectively convey our message and avoid any confusion for the reader.