The three correct answers that are part of mandatory spending in the federal government are:
- Social Security
- Medicare and Medicaid
- (Note: "military and defense" is part of discretionary spending, not mandatory spending)
So, the correct selections are:
- Social Security
- Medicare and Medicaid
There seems to be only two options provided that are part of mandatory spending. If you need three items, please clarify or check if there are more options in your list.