whEn Do somE lEss DEvElopED CountriEs Allow tAx-FrEE invEstmEnt rEsErvEs A.whEn thE EConomy oF thosE CountriEs is not Doing wEll. B.At A lAtEr stAgE For invEstmEnt in thosE CountriEs. C.whEn An unFAvorABlE DEprECiAtion in AllowAnCE is usED. D.whEn thE propErty oF thE plAnt is writtEn oFF At A lowEr rAtE in thE lAtEr yEArs.