Select the true statement regarding electronic messages.

Question $7$ Select one:

A$.$

Electronic messages are the private property of the system's owner, not of the sender$.$

B$.$

Electronic messages are extremely safe as they cannot be saved or leaked.

C$.$

When electronic messages are deleted, it means that they are completely destroyed.

D$.$

There can be no permanent record of electronic messages.

E$.$

They cannot be forwarded by recipients to others without the original sender knowing it$.$