Ms. Gonzales decided to remain in Original Medicare (Parts A and B) and Part D during the Annual Enrollment Period (AEP). At the beginning of January, her neighbor told her about the Medicare Advantage (MA) plan he selected. He also told her there was an open enrollment period that she might be able to use to enroll in a MA plan. Ms. Gonzales comes to you for advice shortly after speaking to her neighbor. What should you tell her?