Final answer:
Aaron Beck identified cognitive distortions, including catastrophizing, all-or-nothing thinking, and emotional reasoning.
Step-by-step explanation:
Aaron Beck, a renowned psychologist, identified several cognitive distortions. These include catastrophizing, all-or-nothing thinking, and emotional reasoning (option a). Catastrophizing refers to magnifying negative events and predicting disastrous outcomes. All-or-nothing thinking involves viewing situations as either completely good or completely bad, with no middle ground. Emotional reasoning is when a person believes their emotions reflect reality, even without evidence. These cognitive distortions can often lead to distorted thinking patterns and negative emotions.