A. When \( c = 0 \) , both sides of the equation \( \frac { a } { c } = \frac { b } { c } \) are undefined, so the equation is true even if \( a \neq b \) .
B. When \( c = 0 \) , both sides of the equation \( \frac { a } { c } = \frac { b } { c } \) are equal to \( 0 \) , so the equation is true even if \( a \neq b \) .
C. When \( c = 0 \) , both sides of the equation \( \frac { a } { c } = \frac { b } { c } \) are equal to \( 0 , \) so the equation is false even if \( a = b \) .