The energy needed in breaking a drop of radius R into n drops of radius r is:

• A

  $\left(4{\mathrm{\pi r}}^2\mathrm{n}-4{\mathrm{\pi R}}^2\right)\mathrm{T}$

• B

  $\left(4\pi R^2-4\pi R^2\right)lT$

• C

  $\left[\left(4/3\right){\mathrm{\pi r}}^3-(4/3){\mathrm{\pi R}}^3\right]\mathrm{T}$

• D

  $\left(4{\mathrm{\pi R}}^2-\mathrm{n}4{\mathrm{\pi r}}^2\right)\mathrm{lT}$