Catalysts increase the speed of a reaction by . A. lowering the activation energy of the reaction B. increasing the concentration of the reactants C. increasing the energy of the reactants D. increasing the entropy of the reactants E. increasing the enthalpy of the reactants

Ithink carbon dioxide, i am not completely sure.tell me if i am wrong.

Answer246 k;

Reaction involved in present system is :   c12h22o11 + h2o → 2 c6h12o6the reaction system is obeying following rate law:   rate = k[c12h22o11]thus, it is a first order reaction.now, for 1st order reactionrate constant (k) =  given: initial conc. = 3.0 g, final conc. = 2.7 g, t = 2.5 h∴rate constant (k) =  ∴ k = 0.04215 h-1now, for 1st order reaction, half life = 0.693/k = 0.693/0.04215 = 16.4 hthus correct answer is option b