Which statement about Junos firewall filters is correct?

Which statement about Junos firewall filters is correct?
A . Firewall filters can be applied as a security policy action
B . Firewall filters do not operate on stateful flows and they serve no purpose in a next-generation firewall
C . Firewall filters can be applied as the packet enters the security device, and they are stateless.
D . Firewall filters are applied to TCP packets only. and they do not block UDP pockets

Answer: B