Which sentence below is a run-on? PLEASE HELP!!! ASHAP
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A. Kirsten and Victoria walked the dog to the park and hung out.
B. Kirsten brushed her dog after dinner. She decided that she would take him for a walk.
C. Kirsten brushed her dog after dinner she took the dog for a walk and ran into Victoria.
D. Kirsten ran into her friend Victoria while she was walking her dog.