""Tip of the Tongue"" Refers to Which Psychological Phenomenon

""Tip of the tongue"" refers to which psychological phenomenon?

A) Being aware of an answer but unable to produce it
B) Being unaware of an answer but producing it automatically
C) The phenomenon of stuttering when retrieving complex information
D) The tendency for participants to recognize more items than they can recall freely
E) Forgetting when the context at encoding and retrieval are inconsistent