Answer:
A.
Step-by-step explanation:
In English, usage of parallel structure is done to reveal the same pattern in a sentence. The same pattern is used to show that both the ideas or all the ideas hold same importance.
From the given statements, the one that exemplifies a parallel structure is option A. In this sentence comparison is drawn between arcitectural structures. The parallelism is shown with the use of 'the' before these structures.
Therefore, option A is correct.