Which of the following is NOT a way to speed up a chemical reaction? (Select all that apply)

Question

a
increasing the concentration of one of the reactants
b
increasing the temperature of one of the reactants
c
decreasing the surface area of one of the reactants
d
decreasing the temperature of one of the reactants

Answer 1

c
decreasing the surface area of one of the reactants

Answer 2

Select all that apply please

Answer 3

c
decreasing the surface area of one of the reactants
d
decreasing the temperature of one of the reactants