Consider the following code that will assign a letter grade of $\text{'}$A$\text{'},\text{'}$B$\text{'},\text{'}$C$\text{'},\text{'}$D$\text{'},$ or $\text{'}$F$\text{'}$ depending on a student's test score,

$)(90)(80)(70$

This code will work correctly in all cases

This code will work correctly only if grade $60$

This code will work correctly only if grade $<mn\; id="EditorElement\_8569">6</mn><mn\; id="EditorElement\_8570">0</mn>$

This code will work correctly only if grade $<mn\; id="EditorElement\_8510">7</mn><mn\; id="EditorElement\_8511">0</mn>$

This code will not work correctly under any circumstances