 Asking them the question of what Medicare should I be taking and why is the first question you should ask. Help me select the Medicare plan that's necessary. So when you come to this decision, you're going to face this idea of Medicare A and B, Medicare D or Medicare C. Which plan do we take? We call it the alphabet soup of Medicare, and it's only just begun. There are many more letters in Medicare planning than A, B, C, and D.