**Core Concept**
The patient's hypotension is likely due to sympathetic blockade caused by the spinal subarachnoid block, leading to vasodilation and decreased venous return. This is a common complication of regional anesthesia, particularly with local anesthetics like lidocaine or bupivacaine.

**Why the Correct Answer is Right**
To manage hypotension, the primary goal is to increase sympathetic tone and maintain or increase blood pressure. This can be achieved by administering vasopressors, such as **ephedrine** or **phenylephrine**, which stimulate alpha-adrenergic receptors and cause vasoconstriction. Additionally, fluid administration can help increase blood volume and maintain or increase cardiac output. **Volume expansion** with crystalloids or colloids can be effective in managing hypotension.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided.

**Clinical Pearl / High-Yield Fact**
It is essential to note that the choice of vasopressor and fluid management strategy may depend on the patient's underlying medical conditions and the specific type of regional anesthesia used. For example, patients with cardiovascular disease may require more cautious use of vasopressors.

**Correct Answer: None of the above options.