What initiated the zoom climb?
The answer to the key question is answered to the investigators since a long time because they have all the elevator and stick FDR data in front of them:
What initiated the zoom climb?
a) pilot pulling the stick (input recorded by FDR)
b) weather, without stick input (input not recorded by FDR)
c) elevator input by a malfunctioning unit (input recorded by FDR)
d) sort of other mishandling
As there is no AOT out there about tech malfunctions the answer is obvious