1.( )to everyone sometimes puts you at a disadvantage when y

1.( )to everyone sometimes puts you at a disadvantage when you are doing something private.
A.Known B.To know C.Being known D.Having known
2.Only after I threw away the bag did I realize it was ( ).
A.mine own B.of myself C.my own D.of my own
请给出答案,并且简要说下理由,