Seaming order?

So i’m almost done with this. I need help.

The arm was made by picking up stitches along the sides and top of the shoulder. Now i have the armpit and the bottom of the arm to seam up.

Which order do i do the seams in?
do i seam B to C and then seam A -or- do i do seam A and then seams B to C?

Personally, I would seam B to C first because it seems that it would be easier with that little armpit section to do it when you have more ease with the length of the sleeve still open. Then I would seam the length of the sleeve, from wrist to armpit, so that any boo boos or seaming problems can be hidden in the armpit area.