Final answer:
The correct sentence without a faulty parallel structure is C. 'The company is planning to employ an accountant and software engineer,' as it maintains parallelism by listing two job positions as nouns.
Step-by-step explanation:
The statement that does not have a faulty parallel structure is the company is planning to employ an accountant and software engineer. This sentence correctly uses parallelism by listing two job positions that the company plans to employ, both formatted as nouns and connected with the conjunction 'and'.
Sentence A incorrectly mixes verb forms ('has done' and 'will do'). Sentence B fails to maintain parallel structure by not using adjectives consistently ('positive, enthusiastic' vs. 'has much knowledge'). Sentence D is correct in its parallelism, matching the adjectives ('popular and rich').
In terms of parallelism in sentence construction, it is important that items in a list are of the same grammatical form for the sentence to be parallel. Thus, this reflects a correct use of parallel structure.