Answer:
Lincoln replaced McClellan with Ambrose E. Burnside, and Fitz-John Porter
All of the choices make some sense, but the main reason was:
D ) They sought knowledge, power and riches.
Too much or too little rain may have ruined crops, creating food shortages. Earthquakes or erupting volcanoes may have destroyed communities.
The number of electors from each state is the same quantity as that state's congressional delegation (members of the House of Representatives plus two Senators). In total, there are 100 senators and 435 state representatives.