Determine What, If Any, Value to Assign To $f ( a )$

Multiple Choice

Determine what, if any, value to assign to $f ( a )$ to make f continuous at $x = a$ . $f ( x ) = \frac { x ^ { 2 } - 6 x + 8 } { x - 4 }$ ; $a = 4$

A) $f ( 4 ) = 6$
B) $f ( 4 ) = - 6$
C) $f ( 4 ) = 2$
D) $f ( 4 ) = - 4$
E) No value of $f ( 4 )$ will make it continuous at 4.