Patti finds her husband derek asleep in his recliner. she gently touches his shoulder

Patti finds her husband derek asleep in his recliner. she gently touches his shoulder and says, "derek, wake-up; the dog needs to go out." derek abruptly responds, "patti, i am awake! " what type of brain waveforms did derek display right before being awakened?

a. delta waves
b. theta waves
c. beta waves
d. alpha waves with sleep spindles and k-complexes