<span>A parallel construction refers to the fact that the same form of a word or phrase is used in all of its examples. So, having this in mind, the correct answer is A. being happy, being sad, being depressed, because all of these constructions have a gerund being + an adjective. The other examples aren't as uniform as the first one is, which is why they are not parallel. </span>
Answer:
The main idea that is NOT stated on the text
What? Is there a question to answer here?