what would happen to an existing flow if the policy source address or the destination address is changed and committed?

After applying the policy-rematch statement under the security policies stanza, what would happen to an existing flow if the policy source address or the destination address is changed and committed?

A.
The Junos OS drops any flow that does not match the source address or destination address.

B.
All traffic is dropped.

C.
All existing sessions continue.

D.
The Junos OS does a policy re-evaluation.