Which Statement by a Patient Who Has Been Prescribed Quinidine

Which statement by a patient who has been prescribed quinidine (Quinaglute) indicates to the nurse the need for additional teaching?

A) "I use over-the-counter St. John's wort to help with my memory."
B) "I am careful not to eat too much food that is high in alkaline ash."
C) "I check my heart rate and blood pressure at least once a day."
D) "I weigh myself every morning at the same time."