Cómo ocultar automáticamente la respuesta de la publicación de otros

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Hello, since I am using Discourse to build a PTE learning platform which has many questions.
I found it might not be well if showing other students’ responses when answer a question. So how to automatically hide others’ post replies in the beginning? and they can choose to open the replies if they want to check other students’ answers.

Here is a question example.

Thank you!!

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This reminds me of a plugin my friend and I wrote to allow certain groups of people to collapse other people’s posts.

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