**Core Concept**
Subjective symptoms are personal experiences, such as pain or fatigue, while objective symptoms can be verified by a healthcare provider through examination or testing. Objective symptoms are often quantifiable and can be measured, such as a fever, tremors, or abnormal reflexes.

**Why the Correct Answer is Right**
Objective symptoms are determined by the healthcare provider's observation and measurement of the patient's physical state. This can include vital signs like temperature, pulse, and blood pressure, as well as clinical findings like abnormal lung sounds or a rash. The provider's findings are often documented in the patient's medical record, making them a crucial part of the diagnostic process.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the determination of objective symptoms.
* **Option B:** This option is incorrect because subjective symptoms are personal experiences that cannot be verified by a healthcare provider.
* **Option C:** This option is incorrect because physical examination is just one aspect of determining objective symptoms, and does not encompass the full range of measurable and observable signs.

**Clinical Pearl / High-Yield Fact**
When taking a patient's history, it's essential to distinguish between subjective and objective symptoms to ensure accurate diagnosis and treatment. A good history often includes a clear description of both subjective and objective symptoms, helping the provider to develop a comprehensive understanding of the patient's condition.

**Correct Answer:** D.