insted of choosing one of those 3 or 4 question so i came with my own tirms.
insted flash kill hes mother and save himself and hes power or same flash's mom and lose flash power and dei.
so insted of those choises, he actualy have 3 and that last question is to kill the one who murder hes mom, either way he would dei if he dont save hes mom or suffer for murdering hes own mother.
reason he need to kill the one who murder hes mom, coz either way the result will remain the same.
after him will prevent everything to go on and on so insted flash can atleast kill him to prevent him self or hes family to repeatedly suffer and plus save himself.