Okay, I agree on that point but going back to the lift formula: L = 0.5 x density x TAS^2 x Coefficient of lift x surface. Yes, in straight and level fight at constant IAS the dynamic pressure in the formula of lift will stay constant but one thing makes me doubt. The question says "flaps". Now as it doesn't specify which type of flaps you could argue saying that in the case of Fowler flaps the surface increases and therefore the lift coefficient would eventually decrease.