[Solved] An investor who "writes" a call option against stock held in his or her portfolio is selling a(n) A) Straddle option. B) Put option. C) Out-of-the-money option. D) Naked option. E) Covered option. Brain Waves: Electrical patterns in the brain that can be measured and are indicative of various states of consciousness. Rapid Eye Movement Sleep: A sleep stage characterized by the rapid movement of the eyes, associated with vivid dreaming and increased brain activity. EEG: Electroencephalogram, a test that measures electrical activity in the brain using small, flat metal discs attached to the scalp. Antihistamines: Medications used to treat symptoms of allergies, such as sneezing, itching, and nasal congestion, by blocking the action of histamine.