44.44%(A) As the average grain size increases, the grain boundary energy per unit area decreases. ( 4 voters )44.44%(B) The driving force for grain growth is the decrease in grain boundary energy per unit volume of the material. ( 4 voters )11.11%(C) Higher the temperature, the faster is the grain growth. ( 1 voter )0%(D) Impurity atoms segregated at grain boundaries can retard grain growth.
Based On 9 Votes