it is suggEstED in thE lAst pArAgrAph thAt ______.
A．thE sEriousnEss oF AnimAl ABusE in thE ClAssroom is unknown
B．trAining tEAChErs in AnimAl CArE mAy ContriButE to rEDuCing AnimAl ABusE
C．FEwEr AnimAls hAvE BEEn usED in ExpErimEnts in rECEnt yEArs
D．mAny Biology tEAChErs ArE not trAinED in propEr CArE oF AnimAl