Plants need nitrogen to make proteins I believe
The answer is a, he miscalculated, since the Americas hadn't been discovered by europeans (the native americans were there first) they did not account for america in their calculations
Fifteenth Amendment, amendment (1870) to the Constitution of the United States that guaranteed that the right to vote could not be denied based on “race, color, or previous condition of servitude.” The amendment complemented and followed in the wake of the passage of the Thirteenth and Fourteenth Amendments, which abolished slavery and guaranteed citizenship, respectively, to African Americans.
Because popes and Italian nobles resented the German power over Italy.
