Answer:
Option A is the correct answer.
Step-by-step explanation:
A parallel structure is described as a statement or idea that uses the same pattern of words when expressed. It means that all the ideas are equally important. In this case, option A has four statements. First one is used to provide context. The other three use past tense (strung, added, attached, actions made by Sharon) to indicate that everything was part of the same process and had the same level of importance.