Which of the following chemical equations is unbalanced?

A) CH4 + 2O2 CO2 + 2H2O
B) 3Mg + Mn2O3 3MgO + Mn
C) AgNO3 + LiOH AgOH + LiNO3
D) 2NaOH + H2SO4 Na2SO4 + 2H2O

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases