Middle Eastern merchants and traders traveled on eastward trade routes carrying goods such as colored glass or white jade that were unavailable farther east. They would trade these goods for other goods. This process is an example of A.
A trade barrier

B.
The democratic system

C.
The barter system

D.
Natural resources

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

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.