Why did museum officials fear for the stolen works from the Dresden Green Vault burglary?

A. They were worried the thieves would exhibit them in a rival museum
B. They believed the thieves would return the artefacts for a ransom
C. They were concerned the thieves would alter or melt down the artefacts to sell them on the black market
D. They thought the thieves would use the jewels to fund a new art collection
Answer: 