Carbon dating of charcoal gathered from a Nok iron smelter at Intini. Nigeria, suggests thai iron technology was established there by 410 B.C. This may not be the oldest smelter in sub-Saharan Africa, however. Archaeologists have located evidence of iron-smelting in the Termit Hills of Niger from as early as 1400 B.C.. but skeptics say the wood used for that dating could have already been centuries old when burned as fuel―a problem that dogs carbon dating, especially in arid places like Niger, where wood desiccates and lasts longer. Of course, the same problem could distort dates for the Intini furnace as well, but here there is an important piece of corroborating evidence: Nok pottery found inside the furnace alongside the charcoal
The passage is primarily concerned with
A . determining which of two ancient cultures in sub-Saharan Africa was more technologically advanced
B . dating the development of iron technology in sub-Saharan Africa
C . assessing certain advantages and disadvantages of carbon dating in sub-Saharan Africa
D . suggesting a possible link between climate and technological development in sub-Saharan Africa
E . contrasting the iron-smelting techniques of two civilizations in sub-Saharan Africa
Answer: B