**Core Concept**
The Starling curve illustrates the relationship between ventricular end-diastolic volume (preload) and stroke volume. It is a graphical representation of the Frank-Starling mechanism, which states that the stroke volume of the heart increases in response to an increase in the volume of blood filling the heart (end-diastolic volume) as long as the heart's contractility and afterload remain constant.

**Why the Correct Answer is Right**
In the context of a mild hemorrhage, the body initially compensates for the blood loss by increasing the venous return to the heart. This increase in venous return leads to an increase in ventricular end-diastolic volume (preload). As a result, the heart pumps more blood with each beat, increasing stroke volume. This is represented by a shift from point X to a point on the Starling curve where the stroke volume is higher. The increase in stroke volume is due to the Frank-Starling mechanism, which allows the heart to adapt to the increased preload by pumping more blood.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a mild hemorrhage would not cause a decrease in stroke volume. The body's compensatory mechanisms would instead lead to an increase in stroke volume.

**Option B:** This option is incorrect because a mild hemorrhage would not cause a shift to a point on the Starling curve where the preload is lower. The preload would actually increase due to the body's compensatory mechanisms.

**Option C:** This option is incorrect because a mild hemorrhage would not cause a shift to a point on the Starling curve where the stroke volume is unchanged. The increase in preload would lead to an increase in stroke volume.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that the Starling curve is a graphical representation of the Frank-Starling mechanism, which allows the heart to adapt to changes in preload by pumping more blood. This concept is crucial in understanding the body's compensatory mechanisms in response to changes in blood volume.

**Correct Answer:** C.