The Rijndael Cipher employs a round transformation that is comprised of
three layers of distinct, invertible transformations. These transformations
are also defined as uniform, which means that every bit of the State is
treated the same. Which of the following is NOT one of these layers?

A.
The key inversion layer, which provides confusion through the multiple
rounds

B.
The non-linear layer, which is the parallel application of S-boxes that
have the optimum worst-case non-linearity properties

C.
The linear mixing layer, which provides a guarantee of the high diffusion
of multiple rounds

D.
The key addition layer, which is an Exclusive Or of the Round Key to
the intermediate State

Explanation:
This answer is a distracter and does not exist.