This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anaesthesia
After performing a single-shot intrathecal anaesthetic consisting of 6.5mg of preservative free bupivacaine and 25 ug of fentanyl, the surgical incision is made and systemic hypotension ensued. To avoid significant decrease in uterine blood flow, first-line therapy to consider is 
Select and explain. 
A. Provide additional inhaled nitric oxide to vasodilate the uterine vasculature, B. Increase maternal cardiac output with use of epinephrine, C. Increase intravascular volume with fluids, D. Use reverse Trendelenburg to decrease aortocaval compression
C: Increase intravascular volume with fluids
Answer: C: Increase intravascular volume with fluids 
Explanation: No need to add on nitric oxide,as uterine vasculature is maximally dilated under normal conditions during pregnancy. Trendelenburg position encourages increase in venous return and α-agonists can increase maternal arterial blood pressure.
i.v fluids can thus improve volume status.