Before Guido d'Arezzo invented music staff notation, music was taught by rote. Which meant the teacher would the song over and over until the student learned it. * A). show
B). sing
C). clap
D). hum

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?