US student immigration question

Hi all. My S24 is headed to McGill for a music performance major. He’s thrilled about it!

I have an immigration question for other US parents who may be have some experience. The CAQ form requests proof of financial capacity. It includes a long list of admissible proof. Do any of you know how many forms of proof are required? Just one, or is the rule of thumb to include as many as possible?

Thanks!