it hAs BEEn provEn thAt wooDEn Doors hAvE A ______ to ExpAnD in humiD wEAthEr unlEss thEy ArE trEAtED with A ChEmiCAl stABilizEr.
(A) movE
(B) DirECtion
(C) tEnDEnCy
(D) DEsirE