A: Between the last known position and the impact, five minutes elapsed. The Rio-Paris flight could have cover a very important distance. At the beginning we had no reason to think that he was almost straight above this last position.
Here is the main point that is almost ruling out an upset at 02.10 causing the crash where the wreckage is actually lying.
It certainly doesn't take 5 minutes to "deep stall" from cruise level to sea level, when in the meantime, the aircraft is circling at the same spot and will keep this attitude at impact.
Something else happened in that sequence that we still don't know.
CVRs and FDRs are really the key to fully understand it.
I'll bet that they will recover the engines.