Of the Given Values Of $x$ , Identify Those at Which the Function Is Continuous

Multiple Choice

Of the given values of $x$ , identify those at which the function is continuous.
- $f(x) =\frac{x-3}{(x-7) (x+4) } ; x=3,0,7,-4$

A) $3,0,7,-4$
B) 3,0
C) $3,7,-4$
D) $7,-4$