**Core Concept**
The diagnosis is based on a HIDA (Hepatobiliary Iminodiacetic Acid) scan, which is a nuclear medicine test used to evaluate the function and structure of the **biliary system**, including the **liver**, **gallbladder**, and **bile ducts**.

**Why the Correct Answer is Right**
Although the specific details of the HIDA scan are not provided, a common use of this test is to diagnose issues such as **cholecystitis** or **biliary obstruction**. The HIDA scan works by injecting a radioactive tracer that is taken up by the liver and excreted into the bile, allowing for visualization of the biliary system.

**Why Each Wrong Option is Incorrect**
**Option A:** Without specific information on the HIDA scan results, it's impossible to determine if this option is relevant.
**Option B:** Similarly, without details, the accuracy of this option cannot be assessed.
**Option C:** This option's correctness depends on the specific findings of the HIDA scan, which are not provided.
**Option D:** The same issue applies, as the HIDA scan's results are necessary to evaluate this option.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that a HIDA scan can show **non-visualization of the gallbladder**, which is suggestive of **acute cholecystitis**.

**Correct Answer:**