(a) ability of catalyst to increase the chemical reaction ; ability of catalyst to decrease the reaction . \[\](b) ability of catalyst to decrease the reaction ; ability of catalyst to direct the reaction to give particular products.\[\] (c) ability of catalyst to decrease the reaction ; ability of catalyst to reverse the reaction to give particular products .\[\] (d) ability of catalyst to increase the chemical reaction ; ability of catalyst to direct the direction the reaction to give particular products
