Which was a result of the european crusades? a. the decline and fall of the abbasid caliphate b. the assimilation of european culture in the arab world c. the decrease in trade between muslims and christians d. the increase in trade between europe and the east

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.