Everyone should be careful of their behaior.这句中下面哪个是错的:A should be B careful C their D be

x��j�@�_e�*R�%z[�J�F"��D��l�[�#�7h�X+U�e� �K��LV�B�T�E]��Y������e����+i h��K
Q��*%r)�$@V��*��BRQ�載k&�#/�nׇ���3�n������]S���}6�D5��#����Q�e
v�x^��
)�y�#�2C.�6X�cxj��dD��[z����j�4��o�Y ���E���旽p��+�W����TNj~i�a�l|����~�xjЉɌ� VH�M��c�[ȹ]����+����)1�h�C����2V�Ud��<����U�ٽ;y�c�_B�x< nx�X-