Who was Sacagawea?

A. A boat captain who showed Lewis and Clark the Missouri River.
B. A French Diplomat
C. A Native American chief who attacked the Lewis and Clark
Expedition
D. A Native American woman who helped the Corps of Discovery
SUBMIT

You can decode the answer from the explanation

Explanation:

A native American woman of age 16 who helped the discoverers on their expedition.

Clark and Lewis

d) a constitutional amendment

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).