Answer:
B. A technological improvement
Step-by-step explanation:
An outward (rightward) shift in supply means an increase in supply.
Technological improvement would increase supply and supply curve would shift outward.
A decline in labor productivity would reduce supply and the supply curve would shift inward.
An increase in the cost of input would increase the cost of production and supply would fall. The supply curve would shift inward.
A reduction in consumer incomes would reduce demand and not supply.
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