when must you digitally sign the JAR file?

When deploying JavaBeans, when must you digitally sign the JAR file?

A.
When the application does not use Jlnitiator.

B.
When the JAR file is not included in the ARCHIVE parameter.

C.
When all the actions performed by the JavaBeans are permitted by a Java applet.

D.
When all the actions performed by the JavaBeans are not permitted by a Java applet.