Which three are true about servlet filters？（）

• A、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.