Final answer:
The recommended herbal supplement for a client prone to gastrointestinal symptoms and heartburn is (a) ginger.
Step-by-step explanation:
For a client prone to gastrointestinal symptoms and heartburn, ginger would be the recommended herbal supplement to take due to its potential benefits for digestion and soothing properties for the stomach. Ginger has been traditionally used to relieve digestive discomfort, including heartburn, indigestion, and nausea.
It can also help stimulate the production of enzymes that aid in digestion and reduce inflammation in the gastrointestinal tract.
However, it is important to note that every individual may respond differently to herbal supplements, so it is advisable to consult with a healthcare professional before starting any new supplement.