Water at $\text{4°C}$ is filled to the brim of two beakers of glass of negligible coefficient of expansion.  A boy performed an experiment of heating beaker (A) and cooling the beaker (B). The observation he makes will be

• A

  level of water in (B) goes down and the water in the beaker (A) overflows

• B

  water overflows in both (A) and (B)

• C

  water overflows in the beaker (B) and water level goes down in beaker (A)

• D

  water level goes down in both (A) and (B)