Which of the following in-text parenthetical citations is formatted correctly according to MLA style?
1) The rise in the so-called helicopter parenting has led to many problems, including a rise in student anxiety. <214>
2) The rise in the so-called helicopter parenting has led to many problems, including a rise in student anxiety (Wilkins, Charlene).
3) The rise in the so-called helicopter parenting has led to many problems, including a rise in student anxiety ["Raising them Right" 214].
4) The rise in the so-called helicopter parenting has led to many problems, including a rise in student anxiety (Wilkins 214).