Thermal Expansion in Liquids

Q. Four identical conical flasks A, B, C & D each are filled with 500 ml of water. The flasks A, B, C & D are heated till the water attain temperatures of $45{}^{\circ }C,55{}^{\circ }C,65{}^{\circ }C$ and $85{}^{\circ }C$ respectively. Which of the following flasks, contain the highest water level?

1. Flask A
2. Flask C
3. Flask D
4. Flask B