Answer:
A. The underlined independent clauses in the passage above are linked by parallel structure.
Step-by-step explanation:
Parallel structure is a complex device, and a linguistic development having at least two provisos, expressions or words, with comparable syntactic structure and length. It is like parallelism. In parallel structure, sentences have a progression of expressions or conditions, which begin and end in very nearly a comparative design, by keeping the musicality of the lines.