The correct answer is (C) (Long) heroic tale. Any long narrative story that follows a family for several generations; a story or legend of heroic achievement or adventure. Also, a narrative of the history of a medieval Icelandic family or Norwegian king, etc., including achievements and events.

Saga comes from Old Norse saga (tale).

Examples of use:

• Comfortable in her chair, she turned to the first page of The Forsythe Saga.
• He lay on a blanket nearby with a saga of the Old West in his hands.