Which one of the following statements is true? Justify, explain every the given option.

(a) The recrystallization temperature of brass is higher than the recrystallization temperature of copper.
(b) The recrystallization temperature of bronze is lower than the recrystallization temperature of
(c) Recrystallization cannot occur at room temperature.
(d) According to the Hall-Petch equation, Ostwald ripening follows the empirical rule: copper. where n and K are material-dependent constants, / denotes time, d denotes average grain diameter at time t, and do denotes initial average grain diameter.
(E)When a cold worked material is annealed, the microstructure at time 12 is coarser than the microstructure at time ti, if /2> .