Answer: Option (d) is correct.
Explanation:
According to the law of supply, it states that there is a positive relationship between the price of a commodity and the quantity supplied of a commodity. This means that as the price of a commodity increases, as a result the quantity supplied of that commodity increases.
Therefore, any change occur in the prices of a commodity will affect the quantity supplied of a commodity not supply of a commodity.
All of them are good options, but I would say that D would be the most practical. This is because you’re able to find a large amount of information about a product and view its uses in your situation without paying the cost of the actual product itself.