pitch, volume, rate, and pronunciation
articulation, rate, dialect, and vocal variation
volume, articulation, dialect, and pronunciation
vocal variation, pitch, volume, and pronunciation
raising your pitch.
increasing the level of articulation.
projecting more air through your larynx.
using a rising intonation pattern
No; if Savannah is proud of her southern heritage, she should sound like a southerner and not attempt to modify her vocal style.
Yes; if Savannah's dialect is so pronounced that audiences can't understand her, then she should attempt to modify her dialect.
No; Savannah probably needs to slow down some to give non-southern audiences more potential for understanding, but she shouldn't modify her dialect.
Yes; speakers should minimize any traces of regionalism in their vocal delivery so as to be understood by a wide variety of audiences.