**Core Concept**
Hypovolemic shock occurs due to a decrease in circulating blood volume, leading to inadequate perfusion of vital organs. The primary goal of management is to restore circulating blood volume and maintain organ perfusion.

**Why the Correct Answer is Right**
The best solution to use in hypovolemic shock is crystalloid fluid, specifically normal saline or lactated Ringer's solution. These fluids are isotonic, meaning they have the same osmotic pressure as blood, which allows them to expand plasma volume without causing hemodilution. Crystalloids also have a small molecular weight, which enables them to distribute evenly throughout the body and rapidly increase intravascular volume.

**Why Each Wrong Option is Incorrect**
**Option A:** **Colloids**, such as albumin or starch solutions, are not the first-line treatment for hypovolemic shock. While they can expand plasma volume, they are more expensive and may cause adverse effects, such as anaphylaxis or coagulopathy.

**Option B:** **Blood** transfusion may be necessary in severe cases of hypovolemic shock, but it is not the initial treatment. Blood transfusion is typically reserved for patients with significant blood loss or those who have received an inadequate response to crystalloid fluids.

**Option C:** **Dopamine** is a vasopressor medication that may be used to support blood pressure in patients with hypovolemic shock, but it is not a solution for restoring circulating blood volume.

**Clinical Pearl / High-Yield Fact**
In hypovolemic shock, the goal is to restore circulating blood volume, not just blood pressure. This can be achieved by administering crystalloid fluids, which can rapidly expand plasma volume and maintain organ perfusion.

**Correct Answer: C. Dopamine.**