單項(xiàng)選擇題

Given a Filter class definition with this method:
21.public void doFilter(ServletRequest request,
22.ServletResponse response,
23.FilterChain chain)
24.throws ServletException, IOException {
25.// insert code here
26.}
Which should you insert at line 25 to properly invoke the next filter in the chain, or the target servlet if thereare no more filters?()

A.chain.forward(request, response);
B.chain.doFilter(request, response);
C.request.forward(request, response);
D.request.doFilter(request, response);


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