Please answer the following question by reasoning step-by-step.
She had a vision before going to bed, what was she doing?\nOptions:\n- falling asleep\n- rest\n- cooking food\n- dreaming of\n- laziness

dreaming of
Dreaming is a series of thoughts, images, and sensations occurring in a person's mind during sleep.

Going to bed means going to sleep.

.

The final answer: dreaming of