Final answer:
The package insert section 'B. Indications and Usage' specifies that Diovan, an angiotensin receptor blocker, is used to treat high blood pressure, making it the correct medication to refill for Mr. Greer.
Step-by-step explanation:
To determine which medication Mr. Greer should refill for his high blood pressure, the relevant section of the package insert is "B. Indications and Usage". This section contains information on what the medication is used to treat, including specific conditions like high blood pressure. Both Crestor and Diovan are medications used to treat or improve symptoms of cardiovascular conditions; however, Diovan (Valsartan) is an angiotensin receptor blocker (ARB) that is specifically used for treating hypertension. On the other hand, Crestor is commonly used to lower cholesterol. Therefore, for high blood pressure, Diovan is the appropriate medication to refill for Mr. Greer.