Final answer:
Upon waking from a dissociative fugue, the most common immediate reaction is confusion and disorientation due to a temporary loss of identity and memory, leading to bewilderment.
Step-by-step explanation:
The common immediate reaction upon "waking" from a dissociative fugue is a) Confusion and disorientation. When an individual emerges from a state of dissociative fugue, they often find themselves in a place or situation with no recollection of how they got there, leading to feelings of bewilderment and perplexity. Due to the abrupt change in their awareness and the gap in memory, the individual can be significantly distressed and might not recognize their surroundings or why they are there. This is because a dissociative fugue, a form of dissociative amnesia, is associated with a temporary loss of one's identity and past memories, leaving the person unsure about who they are and unable to recall important personal information.