Final answer:
A bolus of isotonic crystalloids should be administered over 5-20 minutes in cases of hypotensive shock to quickly restore circulating volume and blood pressure while monitoring the patient's response.
Step-by-step explanation:
The appropriate timing for administering a bolus of isotonic crystalloids in cases of hypotensive shock is typically 5-20 minutes (Option B). This rate of infusion is aimed at quickly restoring circulating volume and blood pressure. It is important to monitor the patient's response to the fluid bolus closely, as too rapid or excessive administration can lead to complications such as fluid overload. Isotonic crystalloids, such as normal saline or lactated Ringer's solution, are matched to the body's natural osmolarity, making them a safe choice for fluid resuscitation.