To Specify That $X _ { 1 }$ Must Be at Most 75% of the Blend Of

To specify that $X _ { 1 }$
Must be at most 75% of the blend of $X _ { 1 } , X _ { 2 } , \text { and } X _ { 3 }$
We must have a constraint of the form

A)
$X _ { 1 } \geq 0.75 \left( X _ { 2 } + X _ { 3 } \right)$
B)
$X _ { 1 } \leq 0.25 \left( X _ { 1 } + X _ { 2 } + X _ { 3 } \right)$
C)
$X _ { 1 } \leq 0.75 \left( X _ { 1 } + X _ { 2 } + X _ { 3 } \right)$
D)
$0.75 X _ { 1 } \geq X _ { 1 } + X _ { 2 } + X _ { 3 }$
E)
$.25 X _ { 1 } \geq 0.75 \left( X _ { 2 } + X _ { 3 } \right)$