Jeff and Franco Are Both Involved in a Sleep Study

Jeff and Franco are both involved in a sleep study. Jeff wakes up screaming early in the night. The researchers notice that although his eyes are open, he doesn't seem to be totally awake. Additionally, recordings show Jeff's heart rate is very fast. Franco wakes up much later in the sleep period because he was frightened by the content of his dream. He was able to report to the researcher a vivid account of the dream upon waking. Jeff likely experienced a _____, whereas Franco experienced a _____

A) sleep terror; somnambulism.
B) sleep terror; nightmare.
C) nightmare; somniloquy.
D) nightmare; sleep terror.