The correct answer is (C) Memento; object from the past; object having interest by reason of its age or association with the past. Also, material evidence of something that no longer exists; trace of something that no longer is practiced, believed, etc. Remaining fragments or parts.

Memento comes from Middle English relik, Old French relique, Latin reliquiae (remains).

Examples of use:

• Many relics simply disappeared during the following months.
• Relics from such sites would often ended up in the hands of collectors.