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Which of the following, if true, would most weaken the author's contention that a lack of imported ceramics in archaeological digs is a sign of decreased economic activity and disappearing markets?
This statement strengthens, not weakens, the author's assertion. If there were fewer cities, this would indicate that markets were indeed contracting.
The quality of Roman pottery has no bearing on the author's assertion. The author's assertion relies on the fact that archaeologists could not find imported pottery from the post-Roman era (i.e. the Early Middle Ages).
This statement strengthens, not weakens, the author's assertion. If imports of wine in Britain decreased, this would provide another example of a contracting economy.
This statement neither weakens nor strengthens the author's assertion. If true, this would apply equally to Roman and post-Roman sites and therefore we cannot use this fact to explain why there is less pottery in post-Roman Britain.
This answer choice provides an alternative explanation for the lack of imported pottery. The existence of domestic pottery indicates that there was a market for these goods and suggests that domestic production of pottery simply displaced imported products.