If same mass of liquid water and a piece of ice is taken, then why is the density of ice less than that of liquid water?

Options

1. AIce molecules are more tightly packed than liquid water molecules.
2. BThe crystalline structure of ice leaves more empty space compared to the random arrangement in liquid water.
3. CIce molecules have higher kinetic energy than liquid water molecules.
4. DThe hydrogen bonds in ice are weaker compared to those in liquid water.