Which idea was supported by aristarchus, copernicus, and galileo?.

what are the others?

the answer wold be b) travel among nations should be regulated by an international organization

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.