CSU Health and Medical Medicare Beneficiaries Discussion

I’m studying and need help with a Health & Medical question to help me learn. Please identify the group(s) of people who are eligible for Medicare but have not reached the age of 65. What type of Medicare benefits (Part A or B) can these groups enroll in? Can you think of reasons why these groups are covered by Medicare?If a Medicare beneficiary lives in or travels to a foreign country, does or should Medicare cover medical services rendered in that country – for either an emergent encounter or on an ongoing basis?