Which of the following options demonstrates correct sentence structure?

Question

Quizplus · Accepted Answer

Parallel ideas are those that have the same level of importance within a sentence. In order to show this, we need to use parallel structure. Depending on the sentence, we may need to use parallel words, phrases, or clauses (this means that the words, phrases, or clauses use the same grammatical structure). Typically, we join parallel structures with conjunctions such as "and" and "or."
In this example, we need to make sure the two ideas (the reasons the speaker is delighted) have parallel structure.
I am delighted, not only because you have come visit, but also because you have brought my favorite chocolates.
This sentences has parallel structure because both of the ideas (reasons) start with "because," which maintains the overall parallel structure.
I am delighted, not only because you have come visit, but also I love the chocolates. does not have a parallel structure because the second half of the sentence does not use the same phrase of "because __________."
I am delighted, not only you have come visit, but also because you have brought my favorite chocolates. does not have a parallel structure because the first half of the sentence does not use the same phrase of "because _________." Another way to look at it is the second half adds in "because" when it shouldn't.
I am delighted, not only because of your visit, but also my favorite chocolates are here. does not have a parallel structure because the second half of the sentence does not use the same phrase of "because __________."

Which of the Following Options Demonstrates Correct Sentence Structure