Answer:
D). Troubleshooting computer network problems.
Step-by-step explanation:
Parallelism is exemplified as the fundamental grammatical element that proposes the parallel construction or use of words or phrases or verb form to mirror that each is carrying equal significance in the sentence. A parallel structure not only enhances the readability of the sentence but also ensures the stability of the thoughts and effective delivery of the message to the audience.
The similar word or phrase design would maintain the flow of ideas with a touch of clarity and efficacy. Therefore, in the given question, option D 'Troubleshooting computer network problems' is the correct answer as it follows the plural structure of the sentence(reports, presentations) and compliments with 'problems' and nurtures the readability and flow of the sentence.