Skulls of Homo sapiens were found during an excavation. The skulls were preserved because the bodies were frozen. So, these fossils are (1) fossils.

(1) A. Mineralized

B. Mold

C. Original-tissue

Option (C)

Explanation:

In the frozen areas the temperature remains relatively cold which favors the preservation of the original hard and the solid parts of the organisms. The body becomes frozen due to the low temperature, as a result of which the tissues are not completely replaced by any type of secondary minerals.

In the given condition, the skull of Homo sapiens that are found to be preserved under the frozen rock bodies, are found to contain the majority of the original body parts, for which it can be considered as the original-tissue fossils.

Hence, the correct answer is option (C).