I think it's letter:
B.Coefficients are placed in front of the reactants and/or products
3 *0.75 = 2.25 mol that’s is ur answer for this question
1. inner core
2. outer core
3. mantle
4.crust
The human “family tree” may be better described as a “family bush,” within which it is impossible to connect a full chronological series of species, leading to Homo sapiens, that experts can agree upon.
