Which sentence demonstrates correct parallel structure?

The correct answer to the question "Which sentence demonstrates correct parallel structure?" is Option D: The job requires strong communication skills, problem-solving abilities, and a willingness to learn..

The other options — A) The new gym offers state-of-the-art equipment, certified trainers, and has spacious locker rooms., B) To succeed, one must be dedicated, work hard, and possess perseverance., C) She enjoys hiking, biking, and to swim in the lake. — are incorrect for this GED Exam Prep question. As explained above: Option D maintains parallelism by listing three noun phrases: 'strong communication skills,' 'problem-solving abilities,' and 'a willingness to learn.' The other options mix grammatical forms in thei…