Hi, I'm having trouble understanding why D is wrong.
I understand that the lack of evidence that the tokens from 4000 BC to 3100 BC were meant to be placed in envelopes would not have an effect on Schmandt-Besserat's theory about the use of tokens before 4000 BC. However, I don't see how we know that her theory WAS about the use of tokens BEFORE 4000 BC.
The passage says
"LATER envelopes are also inscribed with impressions of tokens in the outer clay, signaling exactly what each envelope contained. Noting that THESE inscriptions are clearly traceable to later, known inscriptions of farm products, Schmandt-Besserat theorizes that THE envelopes contained official records of villagers’ contributions to temple-based grain and livestock pools. After 4000 B.C., hundreds of new token forms developed..."
The passage doesn't state that the theory is limited to the time period before 4000 BC. At most, the passage says that the theory is about "later" envelopes (relative to the "earliest" envelopes). Although the passage does immediately go into talking about post-4000 BC developments, it doesn't say that these post-4000 BC envelopes are somehow different from the "later" envelopes mentioned previously.
Is there another reason why D is wrong? Or is it strictly about the time period?