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Dental caries and gingivitis can be exacerbated

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by Nick0203 » Tue Jan 15, 2019 1:08 am
)"Not only...but also" is the correct usage.
A and B can be eliminated for the use of 'patients' twice.
C is passive in "but also by time when the foods are eaten"
D changes the meaning.
E is the best choice.
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