What does it mean if AdminB sees a locked icon on a rule?

AdminA and AdminB are both logged in on SmartConsole.

What does it mean if AdminB sees a locked icon on a rule? Choose the BEST answer.
A . Rule is locked by AdminA, because the save bottom has not been press.
B . Rule is locked by AdminA, because an object on that rule is been edited.
C . Rule is locked by AdminA, and will make it available if session is published.
D . Rule is locked by AdminA, and if the session is saved, rule will be available

Answer: C