Answer:
Advancements were made in an attempt to counteract the stalemate of trench warfare
Explanation:
The writings of Ayuba Suleiman Diallo are an important source of information on the slave trade because they are a first hand account of the slave trade by a slave.
C . Blanche K. Bruce of Mississippi took the oath of office and became the first African American to preside over the Senate in 1879.
