The growing uncertainty about the outcome of events
I'd say B and D. Elementary school reports don't necessarily equate to knowledge of a subject (and research on the branches of government doesn't help you know <em>how</em> to govern), so A is out. C is nice, but popularity and charm do not a leader make, he might have ulterior motives to being as such, maybe taking advantage of the power? B and D show things he has done that would give him useful skills in the position.
The anwer is <span>Few airmen volunteered for positions as gunners.
</span><span>in The Death of the Ball Turret Gunner depicted the situation in World War II. You can see it from these lines:
</span><span><em>Six miles from earth, loosed from its dream of life, - </em>indicates that he's lonely
</span><span><em>I woke to black flak and the nightmare fighters. - </em>indicates that he held the position as gunners.</span>
