At what point is the check for whether or not I meet the criteria for Ending C?

This may be a bit spoilery, so please read at your own caution.

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I played NieR: Gestalt back in the day so I’ve done this before, but it’s been a while.

The criteria for route C is that I need

Route C is different from the previous route (B) in that

However, my dumb self

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My question is simple: is the check for whether I will be given the choice for route C resolved prior to said point of no return, or is it as long as I meet the criteria by the time the choice is presented to me? That is, is my negligence going to cause me to end with route B for a second time or will I be able to meet the criteria past this point of no return and still get the third ending?