How does the author build understanding of the study's findings? А. by listing the data on fMRI results in people who were hungry for 10 hours compared with people who were alone B by defining the ancient roots of scientific labels such as substantia nigra pars compacta and ventral tegmental area C by outlining the relationship between activity levels in the midbrain and how much hunger or loneliness subjects felt D by narrating anecdotes provided by the study's authors about their experiences giving up social media or email​