Nutritionist: Because humans have evolved very little since the development of agriculture,
it is clear that humans are still biologically adapted to a diet of wild foods, consisting
mainly of raw fruits and vegetables, nuts and seeds, lean meat, and seafood. Straying from
this diet has often resulted in chronic illness and other physical problems. Thus, the more our
diet consists of wild foods, the healthier we will be. The boldface portion plays which one of
the following roles in the argument?
A) It is a conclusion for which the only support offered is the claim that straying from a diet of
wild foods has often resulted in chronic illness and other physical problems.
b) It is a premise for which no justification is provided, but which is used to support the
argument's main conclusion.
c) It is a phenomenon for which the main conclusion of the nutritionist's argument is cited as
an explanation.
d) It is an intermediate conclusion for which one claim is offered as support, and which is used
in turn to support the argument's main conclusion.
e) It is a premise offered in support of the claim that humans have evolved very little since the
development of agriculture.

[spoiler=]D[/spoiler]