How do I configure conditions based on the option selected?

I have a form with a multiple choice question that could be answered with multiple different combinations of answers. I need to use conditional formatting on it, but if/then isn't enough. The option that I am looking for is "unless" and I can't see a way to make that happen. If they pick "Option C", I want the form to skip the next two questions. If they pick "Option A" or "Option B" by themselves or in any combination with "Option C" I want the next two questions to show up. Any idea how to make that happen? I have already tried the "Is not equal to" option to see if that would work and it appears to give basically the same result as the "Is equal to" option when applied to the other choice.

Do you want to implement it in this form of yours?

https://www.jotform.com/form/200543186973055

Could you please clarify your requirement further based on your form so that we would be able to guide you.

On which Question selection you want to show which pages and skip which pages.

We are looking forward to your response.

Thanks.