Benny is taking an online certification course to be eligible for advancing in his job role. The course is 30 hours and, to get through it quickly, Benny has added to his calendar (with reminders set) 3-hour chunks after his 8-hour workday. What component was missing from Benny's time management plan?

Benny's time management plan seems to be missing sustainability. While adding 3-hour chunks after an 8-hour workday may help him complete the course quickly, it may not be sustainable in the long run. It is important to have a plan that is not only efficient but also sustainable. Purposefulness and accountability are also important components of a good time management plan, but they may not necessarily be missing from Benny's plan. Purposefulness involves having a clear understanding of what needs to be done and why, and it seems that Benny has a clear purpose of completing the certification course to advance in his job role. Accountability involves taking responsibility for one's actions and being answerable to someone, and it is unclear from the question whether Benny has someone to hold him accountable for completing the course. Therefore, the correct answer is B - Sustainability.