单项选择题

A. Move the content of the Web application to C:\App1. Change the home directory for App1.
B. Move the content of the Web application to C:\App1. Change the application pool for App1.
C. Remove the App1 virtual directory. Create a new Web site, and then configure the Web site to use port 8080. In DNS, create a Host record for App1.
D. Remove the App1 virtual directory. Create a new Web site, and then configure the Web site to use a host header of App1. In DNS, create a Host record for App1.