Select the Best Translation into Predicate Logic, Using the Following

Multiple Choice

select the best translation into predicate logic, using the following translation key:
a: one
b: two
c: three
f(x) : the successor of x
g(x,y) : the sum of x and y
Nx: x is a number
Dxy: x is divisible by y
Gxy: x is greater than y
-The successor of a number is greater than itself.

A) Gf(a) a
B) Gaf(a)
C) (∀x) [Nx ⊃ Gf(x) x]
D) (∀x) [Nx ⊃ Gf(a) a]
E) (∀x) [Nx ⊃ Gaf(a) ]