Which of the following denotes a commitment to timely action?

The phrase "ASAP" stands for "as soon as possible" and clearly indicates a sense of urgency and a commitment to taking action in a timely manner. When someone uses ASAP, they are prioritizing the task and expressing that it should be completed quickly, which is why it is the correct answer. This kind of phrasing is commonly used in both professional and personal contexts when immediacy is important.

On the other hand, "FYI" means "for your information," which does not imply any urgency or commitment to action. "IIRC" stands for "if I recall correctly," which suggests uncertainty rather than a commitment. "MRAU" is not a widely recognized acronym and does not convey any specific commitment to action. Thus, only ASAP aligns with the notion of timely action.