For 50 points Why would an emperor have a betraying general killed on the polo playing field?

1.to make peace
2.to keep the general from following through with his plans
3.to make it look like an accident
4.to warn others, who might be following the general, not to do so

President of the united states has scheduled a cabinet meeting today to discuss energy policy with specific focus on pollution and global warming. given what you know of the executive branch, which group of attendees would the president most likely expect to provide up-to-date information and expert insight during this meeting?