I would have to say either her sister of Edward Ferrars
A cause-and-effect relationship is signaled by the words "But since."
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.
There are many research processes that can be followed according to the field of the research. However, we can usually think of a 5-step research process for general matters:
- Locating/defining the theme/problem or issue;
- Designing the project;
- Collecting data;
- Interpreting research data;
- Reporting research findings.
If following these steps, "creating notes of information he found so far" would belong to step 3: collecting data. Those notes must be neat and organized so that they will serve for consultation and even citation in the future. The analysis of the information noted is also important for the development of the research.
Direct quotation because its directly from the text