Read the passage below carefully and answer the question that follows:
Excavations at the Taruga site in central Nigeria revealed that iron smelting flourished alongside Nok terracotta production between the sixth and fourth centuries BCE. Archaeologists unearthed thirteen iron-smelting furnaces featuring thick tuyères and slag pits filled with carbonized wood, yielding radiocarbon dates that confirm early indigenous iron metallurgy. Notably, while early hypotheses asserted that terracotta figurines served purely as structural tuyère supports for high-temperature kilns, subsequent micro-stratigraphic analyses demonstrated that the figurines were buried in distinct ceremonial pits prior to furnace operation. Furthermore, despite the high iron content in local laterite ores, charcoal analysis indicated that ironmasters selectively harvested semi-deciduous timber to maintain optimal reduction temperatures, rather than relying on abundant savanna grasses.
According to the passage, what did micro-stratigraphic analyses establish regarding the Nok terracotta figurines?
- They were placed in distinct ceremonial pits before furnaces were operated.Answer
- BThey functioned primarily as structural tuyère supports in high-temperature kilns.
- CThey were constructed from local laterite ores to endure high reduction temperatures.
- DThey were produced using charcoal derived exclusively from savanna grasses.