Which of the following factors can influence aggregate supply?

The correct answer highlights the significance of resource availability and production costs in influencing aggregate supply. Aggregate supply represents the total quantity of goods and services that producers are willing to sell at a given overall price level in the economy. Resource availability includes factors such as the availability of raw materials, labor, and capital, which are critical for production. When resources are abundant and production costs are low, businesses can supply more goods and services at various price levels. Conversely, if resources are scarce or production costs rise due to increased prices for inputs (like labor or raw materials), it would typically decrease aggregate supply.

The other choices do have an impact on the economy but do not directly pertain to the broader concept of aggregate supply in the same way. Interest rates primarily affect aggregate demand because they influence consumer borrowing and spending rather than the capacity to produce goods and services. Changes in consumer trends relate more closely to shifts in demand for products rather than the supply side of the economy. Lastly, while an individual's level of education can impact their productivity, indicating potential supply-side influences at a microeconomic level, it does not directly represent an overarching factor that affects aggregate supply across the entire economy.