Which of the following contributed to the changes in cotton and slaves as shown in the graph? A.) Climate changes that led to more arable land
B.) Increase in international migration of German farmers
C.) Advancements in transportation, such as canals and steamboats
D.) Increase in settlers to the Oregon territory

c

Explanation:

i think they came to washington to protest

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.