Final answer:
Based on the provided information, it is not clear who told the other students about Olivia getting dress coded.
Step-by-step explanation:
Based on the given information, it is not clear who specifically told the other students about Olivia getting dress coded. The text only mentions Olivia being dress coded and does not provide any details about who spread this information to the other students. Therefore, we cannot determine who told the other students about Olivia getting dress coded based on the provided information.