Which is not true for a catalyst?

(A) It appears as a reactant in the net chemical reaction
(B) It causes a lowering of the activation energy
(C) It can be homogeneous or heterogeneous
(D) It increases the rate of a chemical rate of a reaction

Which question could be best answered using the process of scientific inquiry? do different plates have different rock compositions? why did it take so long to develop the theory of plate tectonics? what are different cultural myths caused by plate tectonics? do plates move intentionally to cause volcanic eruptions?