The coronation of charlemagne as emperor caused a decisive break between western europe and what empire?
a. the abbasid
b. the byzantine
c. the sassanid
d. the umayyad

During what century did muhammad recieve his first revelation from god

Answer the questions in the image for zoom in to read : )

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?