California Assessment of Student Performance and Progress (CAASPP) English Practice Exam

The use of the word "suddenly" as a transition in a narrative effectively signals an unexpected event or a shift in the action. It creates a sense of immediacy and surprise, alerting the reader that something significant is occurring without prior indication. This transition helps to convey a dramatic moment, prompting the reader to pay attention to the developing situation.

In contrast, the other options do not serve the same purpose. "Regardless" suggests a continuation despite other factors, "consequently" implies a cause-and-effect relationship, and "in addition" indicates further information or a continuation of ideas without introducing an element of surprise or sudden change. Such transitions help establish continuity or logical progression rather than highlight the unexpected.