Given that $x$ and $Y$ are decision variables and $D$ is a parameter $($input$),$ which of the following are acceptable Linear Programming constraints or objective functions?

$D<mn\; id="EditorElement\_3721787">5</mn><mn\; id="EditorElement\_3721788">0</mn>$

$\frac{x}{Y}\frac{3}{8}$

$x-2Y>15$

$x+Y90$

$x^{**}Y>4$

Max D MaxY