Plz help me I am timed What makes this part of author's argument effective?

Read the excerpt from "Healthy Eating."
It may be an old adage, but it's a goody: you are what
you eat. It's also when you eat and how much you eat.
And while we can all sympathize with the need to have
things fast and easy in our busy lives, nutritionists say
eating well is actually not that hard. It just takes planning
and, some would say, a little help from the village.

A. She uses a quotation from an expert.
B. She uses facts from a reliable source.
C. She addresses a counterclaim.
D. She supports her claim with reasons.