Answer:
the price level is constant.
Explanation:
GDP is the total value (price x quantity) of goods & services produced by an economy during a period of time.
GDP measured at constant dollars is Real GDP i.e at constant price. Constant price is the base year price.
This GDP is a good measure rather than fluctuating price GDP, as it reflects change in only the quantity of goods & services and not price rise i.e Inflation.