Which sentence makes a factual claim? People should stop buying expensive designer breeds of dogs and
concentrate on adopting mixed-breed dogs, or mutts, instead. Mutts
are the most typically American dogs. In addition to being more widely
available, mutts generally suffer from fewer health problems than
purebred dogs. What's more, adopting mutts from an animal shelter is
the kind and morally right thing to do.

A. What's more, adopting mutts from an animal shelter is the kind
and morally right thing to do
B. In addition to being more widely available, mutts generally suffer
from fewer health problems than purebred dogs.
C. Mutts are the most typically American dogs.
D. People should stop buying expensive designer breeds of dogs and
concentrate on adontina mixed-breed dons or mutts instead