The equation
24
x
2
+
25
x
−
47
a
x
−
2
=
−
8
x
−
3
−
53
a
x
−
2
is true for all values of
x
≠
2
a
, where
a
is a constant.

What is the value of
a
?

A) -16
B) -3
C) 3
D) 16