A remote island economy has a highly developed division of labour where households specialise in distinct tasks, such as boat-building, net-weaving, or deep-sea fishing, and trade their outputs.
Which of the following changes is most likely to undermine this division of labour, forcing households to become more self-sufficient?
The construction of a deep-water harbor that allows large merchant ships from neighbouring islands to dock
The introduction of a state-funded vocational institute teaching advanced maritime engineering and fabrication
A decline in trust in the local fiat currency, leading islanders to reject it in favour of direct commodity-for-commodity trade
The deregulation of the island's domestic transport sector, lowering the cost of moving goods across the island
