Final answer:
The correct choice to fix the run-on sentence is 'Ray went to his class, Sasha went to lunch instead.'
Step-by-step explanation:
The correct choice that fixes the run-on sentence is:
Ray went to his class, Sasha went to lunch instead.
This choice uses a comma to separate the two independent clauses, making it clear that Ray went to his class and Sasha went to lunch instead.
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