按照螺旋线的旋向，螺纹分为（）和（）。

A filter must implement the destroy method.
B. A filter must implement the doFilter method.
C. A servlet may have multiple filters associated with it.
D. A servlet that is to have a filter applied to it must implement the javax.servlet.FilterChain interface.
E. A filter that is part of a filter chain passes control to the next filter in the chain by invoking the FilterChain.forward method.