The price elasticity of supply measures how much quantity supplied responds (Qs) to a change in price (P). In other words, the price elasticity of supply measures the price-sensitivity of sellers’ supply. Moreover if you want to calculate the price elasticity of supply, you need to divide the percentage change in quantity supplied divided by the percentage change in price. Moreover, because of the law of supply, the price elasticity of supply has always a positive sign. An increase in price causes the quantity supplied to increase. The supply of a good is said to be elastic if the quantity supplied changes more than the price changes. That is, we can say that if the price elasticity of supply takes the value between 0 and 1, the good has inelastic supply. If the value is larger than 1, we say the good has elastic supply. Lastly, we can say that, the more easily sellers can change the quantity they produce due to availability of inputs, the greater the price elasticity of supply. The correct answer is A.