Answer:
Nervously
Startled
Uneasy
Explanation:
The idea of showing shock or alarm is something that creates tension, and that is what being startled means. So it is the unease of someone. Maybe being too nervous is getting in the way of thinking straight. All these words show a sense of inquietude, alarm, shock, or something similar that expresses some level of anxiety.
That cannot be said for the other options.
