Hello I need help with this precalc question! - Thanks!!!

The
dividing out technique is used where direct substitution leads to a 0/0 scenario and when a
common factor exists between numerator and denominator.

Lets evaluate each of
the four options here:

1) Denominator is x+3 and limit approaches 3. This
equation will not have a 0/0 scenario.

2) The numerator x^2-16 can be written
as (x-4)(x+4). We can see that numerator and denominator have a common factor (x-4).

The equation can be simplified as (x+4) after canceling out common factor
(x-4).

And dividing out technique gives the answer as 4+4 = 8.

3) We do not have a 0/0 scenario and there is no common...