What volume (in ml) of 0.0887 m mgf2 solution is needed to make 275.0 ml of 0.0224 m mgf2 solution?

Which action would reduce the activation energy of a chemical reaction? a. adding a catalyst to the reaction b. adding more reactants to the reaction vessel c. lowering the potential energy of the products d. lowering the potential energy of the reactants e. raising the temperature of the reaction