Those Are Big Numbers!

Algebra Level 1

Order from greatest to least:

$A=\color{#D61F06}{25^{100}}$ $\qquad$ $B=\color{#3D99F6}{2^{600}}$ $\qquad$ $C=\color{#20A900}{3^{400}}$ $\qquad$ $D=\color{#69047E}{4^{200}}$