The awnser should be cotton when it was back then
Otto von Bismarck led Germany to unification.
Explanation:
Seven equal value coins amount to $0.61
Let us assume each has a value 0f $x.
Now as per question
7x = 0.61
x = 0.61/7 = 0.087
So each coin was x≅ $0.087
B.extinction of large animals