According to the neutralist theory of molecular evolution, what is the importance of natural selection in explaining DNA evolution?

Natural selection is not the most important factor in explaining DNA evolution, according to the neutralist theory.
The neutralist theory proposes that the variation observed in populations is mainly determined by mutation and drift, while selection acts mainly at the morphological level.
The neutralist theory refutes the theory of evolution by natural selection.
a) Only I is correct.
b) Only II is correct.
c) Only III is correct.
d) I and II are correct.
e) II and III are correct.