Under IAS 36/AASB 136 'Impairment of Assets' How Many of These

Under IAS 36/AASB 136 'Impairment of Assets' how many of these statements are true?
.When an asset's carrying amount is less than its recoverable amount the asset is said to suffer impairment
.Impairment losses are accounted for as a revaluation decrease if the revaluation model is used
.Impairment losses must be recognised as an expense in that period if the cost model is used

A) 0
B) 1
C) 2
D) 3