Which of the following is most commonly associated with anxiety disorders?

A persistent feeling of discomfort or dread is indeed most commonly associated with anxiety disorders. This option accurately reflects the core characteristic of anxiety, which involves excessive worry and fear about future events or situations that may lead to negative outcomes. Individuals with anxiety disorders often experience an overwhelming sense of unease, apprehension, or tension, which can manifest physically and psychologically. This feeling is distinct from other emotional states, as it significantly impacts daily functioning and quality of life.

The other options provide characteristics more pertinent to different psychological conditions. Intense memories of traumatic events are primarily associated with post-traumatic stress disorder (PTSD) rather than general anxiety disorders. The inability to maintain focus can be linked to various conditions, including attention-deficit hyperactivity disorder (ADHD) or mood disorders, but is not a specific hallmark of anxiety disorders. Lastly, a blissful state of calmness contradicts the essence of anxiety, as individuals with anxiety typically do not experience such tranquility. Thus, the choice regarding persistent discomfort is key to identifying anxiety disorders.