I have a question with respect to lesson #3 of the Patent Strategy Course
https://ip-lawyer-tools.com/course/patent-strategy-basics/

I have filed A and B at EPO and I am planning to file the C application. I have 4 months left into the priority year.

Should I now file a non-provisional EP patent application for A + B + C and claim the priorities of A and B
OR
should I file a provisional patent application for A + B + C without claiming the priorities of A and B, and wait until the end of the priority year, and only then file a provisional patent application for A + B + C (and possibly for C) which claims all the earlier priorities?