In terms of the carbon offsets around military activity, the department is still developing an overall approach for that regardless of the option picked here.
The current serviceability of the CP-140 is around 45%. It's down where it should be. It's an old plane; that's not surprising.
The other point I'd make on the P-8—again, it's a certainty versus some speculation on the other options—is that it can get to theatre much faster than the CP-140.
I'll take your word for your observations on the fuel cost, but because something like the P-8 can get to theatre more quickly, it spends more time doing its actual job as opposed to getting there. It can fly at higher altitudes as well.
Those are the other requirements factored in, in addition to sustainment.