You Should Explain Your Qualifications in the Body of Your

You should explain your qualifications in the body of your cover letter. Which of these is the best statement to use?

A) I am a qualified and fully licensed pediatric nurse.
B) Recent seminars in dysfunctional family dynamics have helped me develop the skills to interact effectively with families that your ad indicates is essential.
C) You need a licensed, registered nurse, and I meet those qualifications.
D) Having graduated summa cum laude from Southwest College, I am well-prepared and eager to apply my knowledge in nursing.