Answer:
The Star-Spangled Banner was written
Robespierre led the C. reign of terror
Answer:
I think it is a, union wins battle of gettysburg.
Explanation:
because its definatly not c, or b and Andrew Johnson wouldnt lead to reconstruction.
A, 20.
The vigesimal numbering system, or base-20 numeral system, is based on the number twenty. Twenty individual numerals/digits are used, ten more than in the usual decimal system.
