Final answer:
A technological advancement that reduces the production time for skateboards would shift the supply curve to the right, indicating an increase in supply due to lower production costs.
Step-by-step explanation:
The factor that would shift the supply of skateboards to the right is C) A technological advancement that reduces the production time for skateboards. This improvement in technology lowers the cost of production, thereby leading to an increase in supply. According to economic principles, a reduction in production costs makes it less expensive for firms to supply any given quantity of skateboards, which is illustrated as a rightward or downward shift in the supply curve.
This adjustment in the supply is not to be confused with factors that affect demand, such as a change in consumer preferences or an increase in the need for skateboards, which would shift the demand curve to the right, not the supply curve.