Problems arise in a variety of ways.这里in a variety of ways是状语吧?是什么状语?

x��R[N�@�J�� 4��PLH � �e@A(�W$P R��;m�܂�N1�$Mg���9sψ!�I8�=�G8)��8���K��.�\𔻒����dݦ�hY3RSSB����,d�+�ްp��B�-���\9�Ď����9.l�T��2F%��R��Y=@��(��Q���e�%�r �7���� }ԭZ��Z��� �EKS�4a=x�:6b��\X����u�6� �:��c���f�ڡךd1��YV�4[�