Mrs. Owens arrives in your Ostomy Clinic complaining that the pouch leaks within a few hours even though she puts it on exactly how she was instructed. The stoma protrudes 2 cm and her abdomen is soft; she is slightly overweight. Which of the following steps is essential to assure proper fitting of her ostomy pouch? Select one: a. Use a skin cement to increase the adherence of the pouch. b. Assess her abdominal topography and stoma with her in the sitting position and standing position. c. Trim the skin barrier to be 1/4 inch larger than the stoma. d. Instruct her to begin using a belt.