Select the APA-style citation that is correctly formatted. a.) A 2015 research paper showed that multiple studies have confirmed the importance of sunlight to the body's generation of vitamin D (p. 13). b.) As multiple studies have shown, exposure to sunlight is critical to the body's generation of vitamin D (Mishra, p. 13). c.) Mishra points out (p. 13) that multiple studies have confirmed the importance of sunlight to the body's generation of vitamin D. d.) According to a review of multiple studies, exposure to sunlight is critical to the body's generation of vitamin D (Mishra, 2015)