Final answer:
A run-on sentence is 'Marlon is going to college he'll register in the fall.' because it lacks proper punctuation between two independent clauses. Run-on sentences can be confusing and are grammatically incorrect. They can be corrected by adding a period, semicolon, or a comma with a coordinating conjunction. The run-on sentence in the options provided is: Marlon is going to college he'll register in the fall.
Step-by-step explanation:
The run-on sentence in the options provided is: Marlon is going to college he'll register in the fall. This is considered a run-on because it contains two independent clauses without proper punctuation or coordinating conjunctions to separate them.
Run-on sentences can lead to confusion and are grammatically incorrect. To fix a run-on, you could add a period to make two separate sentences, a semicolon, or a comma with a coordinating conjunction like 'for', 'and', 'nor', 'but', 'or', 'yet', or 'so'.
As demonstrated in the example: Most people realize that being wealthy won't just happen many college students choose a major that will ensure they make money. This run-on could be corrected by adding a period after 'happen' or by using a semicolon or coordinating conjunction.
Another way to fix a run-on is by making one of the independent clauses into a subordinate clause with words like 'although', 'because', or 'since'. This is shown in the example: By starting my general studies classes last semester, I had the opportunity to take classes in my major this fall. Here, the initial phrase is subordinated, making the sentence grammatically correct.
The run-on sentence in the options provided is: Marlon is going to college he'll register in the fall.