GMAT Sentence Correction (SC) | Re: Recently documented examples of neurogenesis, the production

Recently documented examples of neurogenesis, the production of new brain cells, includethe brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that learn new songs.

A. the brain growing in mice when placed in a stimulating environment or neurons increasing in canaries that
B. mice whose brains grow when they are placed in a stimulating environment or canaries whose neurons increase when they
C. mice's brains that grow when they are placed in a stimulating