Which of the following is a browser security issue that JavaScript developers should remember when developing a script?

Which of the following is a browser security issue that JavaScript developers should remember when developing a script?

A.
JavaScript cannot be disabled in the client and will always run.

B.
JavaScript functionality is immune to viruses, trojans and malware.

C.
JavaScript is a cross-platform scripting language and will generate consistent results regardless of the client or server being used.

D.
Certain JavaScript functionality may be blocked by some browsers, which prevents the script
from running as expected for all users.