Which statement is an example of a sentence correctly using parallel structure?

D. The death penalty should be abolished because it is cruel, because it is expensive, and because it does not deter crime.

The parallel structure refers to the repetition of a chosen grammatical form within a sentence. It uses word, phrases or clauses that are grammatically similar or identical in structure, sound, meaning, or meter. It aims to show that the ideas are equally important and to give a natural flow while reading the piece of writing.

The D is the correct answer because it uses the repetition of the word "because", which gives emphasis to what's being told and also gives a natural flow of reading.

the answer is the last one

the correct answers are:

c. “never in the history of his people had a man married a woman who spoke a different tongue.”

d. “‘it has never been heard,’ was the verdict of an old man speaking a few weeks later.”

e. “this man had come with others to commiserate with okeke.”