College.
Honestly? Those medical office assistant programs are a waste of money. No real office manager takes them seriously.
If you are going to college, an office manager hiring for reception is going to want to see a well rounded GE college education has been completed. They are also going to want to see customer service experience, call center experience, medical office experience, and/or receptionist experience on your resume.
None of the certificates or degrees you've listed are really going to affect your ability to get the job. Experience and the ability to communicate as an adult and be responsible is what they are looking for.
Our large local clinic requires NO degree or wasteful certificates for receptionists. They require 2-4 years of experience in a medical office or health care setting, a high school diploma/GED, and prefer knowledge of computers. medical terms, and phone systems.
Basically, what this tells me, is to research YOUR market and see what they require. If experience trumps education, then take your GE coursework at school while working in a job that gives you the proper experience.