You want to create a valid directory structure for your Java EE web application， and you want to put yourweb application into a WAR file called MyApp.war. Which two are true about the WAR file？（）

At deploy time， Java EE containers add a directory called META-INF directly into the MyApp directory.
B. At deploy time， Java EE containers add a file called MANIFESMF directly into the MyApp directory.
C. It can instruct your Java EE container to verify， at deploy time， whether you have properly configured your application’s classes.
D. At deploy time， Java EE containers add a directory call META-WAR directly into the MyApp directory.