Final answer:
Sentence B, 'Rhonda enjoys to help people rather than to stare at a computer,' is the correct answer because it uses parallel structure by maintaining consistency with the infinitive forms of the verbs.
Step-by-step explanation:
The question is about the use of parallel structure in sentences. Parallel structure enhances symmetry and balance within a sentence and makes it easier for the reader to understand and remember the idea conveyed. Out of the options provided, sentence B uses parallel structure correctly because it pairs two infinitive forms of the verbs: 'to help' and 'to stare', thereby maintaining grammatical consistency. Sentence B reads, "Rhonda enjoys to help people rather than to stare at a computer." Both actions Rhonda enjoys and doesn't enjoy are presented in the infinitive form, providing a clear and balanced sentence structure.