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.
1.moving from easily understood concepts..
2.a group of sentences that deal with one central..
3.an element between paragraphs..
4.may be pointed to..
5.two or more main clauses...
6.helps express...
7.paragraph staying with one...
8.arranged in order that events occured