Final answer:
Hypotension during dehydration indicates decompensation due to excessive loss of blood and water.
Step-by-step explanation:
Hypotension during an episode of dehydration indicates that the body is decompensating due to an excessive loss of blood as well as water and key electrolytes. This is option a) from the question. Dehydration refers to water loss from the body without adequate replacement, which decreases blood volume. The body tries to compensate by pulling water from cells into the blood, causing cells to shrink. This can result in symptoms like low blood pressure and fatigue.