Under IFRS, when an entity chooses the revaluation model as its accounting policy for measuring property, plant, and equipment, which of the following statements is correct?

a. When an asset is revalued, the entire class of property, plant, and equipment to which that asset belongs must be revalued.

b. When an asset is revalued, individual assets within a class of property, plant, and equipment to which that asset belongs can be revalued.

c. Revaluations of property, plant, and equipment must be made at least every three years.

d. Increases in an asset’s carrying value as a result of the first revaluation must be recognized as a component of profit or loss.