Which of the following descriptions of the Apache + Tomcat cluster model is incorrect?

Which of the following descriptions of the Apache + Tomcat cluster model is incorrect?
A . Apache R-proxy means that when one of the Tomcats stops running, Apache will still forward the request, resulting in a 502 gateway error. However, this problem will not exist as long as the server is restarted.
B . The disadvantage of Apache R – proxy is that when the stopped Tomcat server is started again, Apache cannot detect it and still will not forward the request.
C . In Apache mod k mode, Apache will automatically detect the stopped Tomcat server and stop sending requests to it.
D . Apache R-proxy) method has the advantage that it can be set up to allow ache to handle static web pages and let Tomest handle dynamic requests such as ISP and service.

Answer: B