Read the excerpt from "Healthy Eating." She [Ferguson] bought honey wheat bread, not realizing that at her age she needed much more fiber. She was unaware of her carb intake. And she had no idea that on weekends, when she was completing chores and running errands, forgetting to eat was causing problems. "I'd just eat once a day, but then my body would go into starvation mode," she said. So she developed a meal plan and discovered an app for her phone, My Fitness Pal, that she can set to remind her when to eat and what to eat. She can also scan food to determine whether she's met her daily need. "So after I have breakfast and lunch, and if I've had too many carbs, by dinner I know I have to cut back," she said. How does the author support her argument that people can become healthier by making small changes?