[SPOILERS]HELP! (Last MISSION)

[Aly Zaroon]

I completed the last mission where Devin Weston gives 3 option A,B and C

A

Kill Michael for Weston

 

B

Kill Trevor for Steve Heinz ,and for Dave Norton

 

C

Or DeathWish (means save all and deal with your enemies) which is the best ending

 

 

and i thought i will go for each ending one by one by replaying the missions and i pick A after that i went for B after finishing the mission Game redirects me to A's OUTCOME

AND I can't switch to Michael Now

can anyone help me Please is this a glitch or something or its meant to be like this? do I have Start all over again?

 

Thanks