Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ______________ of the catalyst ?

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Use of catalyst is a must in the ammonia manufacture, because the reaction is reversible as well as the heat of dissociation of N2 & H2 is high. The presence of promoter along with the catalyst helps in ______________ of the catalyst ?

A. Stabilisation
B. Increasing the effectiveness
C. Improving the strength & heat resistance
D. All A, B & C