Which of the following can cause a rightward shift in the short-run aggregate supply curve?

A rightward shift in the short-run aggregate supply (SRAS) curve indicates an increase in the total output that firms are willing and able to produce at a given price level. One of the key factors that can lead to this shift is a decrease in the costs of production, particularly concerning wages.

When workers' nominal wages decrease, it reduces the labor costs for firms. Since labor is a vital component of production, lower wages mean that companies can produce goods and services at a lower cost, which makes it more profitable for them to increase their output. Consequently, with reduced production costs, firms are incentivized to supply more at every price level, resulting in a rightward shift of the SRAS curve.

In contrast, the other options reflect scenarios that would typically lead to an increase in production costs. An increase in resource costs, a rise in raw material prices, and an increase in corporate taxes would all raise the costs of producing goods, leading firms to reduce the quantity supplied at the same price level or shift the curve to the left instead. Therefore, the decrease in workers' nominal wages stands out as it directly reduces costs and encourages an increase in output, aligning perfectly with the conditions for a rightward shift in the SRAS curve.