A male client increases daily fiber intake quickly to 60 g/day and complains of constipation and dry mouth. Which of the following is the most appropriate immediate recommendation?

Advise continuing the high-fiber intake but recommend taking over-the-counter laxatives routinely to manage constipation symptoms

Reduce fiber to a lower level, increase water intake (aim for at least eight 8-ounce glasses daily), and slow future increases to allow gastrointestinal adaptation

Tell him to double his current fluid intake immediately and add large amounts of insoluble fiber supplements without changing the rate of increase, because dehydration is never a cause of constipation with high fiber

Recommend eliminating all fiber sources and switching to a high-protein, low-carbohydrate diet to quickly resolve GI symptoms