California Assessment of Student Performance and Progress (CAASPP) English Practice Exam 2025 - Free CAASPP English Practice Questions and Study Guide

Using the phrase "In my opinion" is effective in an argumentative essay because it clearly signals that the statement following it reflects the writer's personal beliefs or interpretations. This phrase invites the reader to understand that what follows is not an established fact but rather a subjective point of view. It establishes a personal connection and sets the stage for presenting arguments that are based on the writer's individual reasoning and insights.

The other phrases, while potentially useful in different contexts, do not convey the same clarity of personal stance as "In my opinion." "In my perspective" and "From my viewpoint" have similar meanings, but they are less commonly used and may not carry the same weight in formal writing. "According to research" implies reliance on external evidence and authority rather than personal opinion, which shifts the focus away from the writer's viewpoint and towards factual support. Therefore, "In my opinion" is the most straightforward and recognizable way to assert personal beliefs in the context of an argumentative essay.