Final answer:
The statement that indicates the client understands the teaching concerning the DASH diet is option a: 'I should eat at least 4-5 servings of vegetables a day.'
Step-by-step explanation:
The statement that indicates the client understands the teaching concerning the DASH diet is option a: "I should eat at least 4-5 servings of vegetables a day." The DASH diet emphasizes the consumption of fruits and vegetables, aiming for 4-5 servings per day. This helps increase the intake of essential vitamins, minerals, and fiber, which can help lower blood pressure.