Let set
Aequals=StartSet b comma o comma s EndSet{b, o, s}.


​a) List all the subsets of set A.

​b) State which of the subsets in part​ (a) are not proper subsets of set A.



​a) Choose the correct answer below.






A.

​{},
​{bb​},

​{oo​},

​{ss​},

​{bb​,

oo​},

​{bb​,

ss​},

​{oo​,

ss​},

​{bb​,

oo​,

ss​}



B.


​{bb​},

​{oo​},

​{ss​},

​{bb​,

oo​},

​{bb​,

ss​},

​{oo​,

ss​},

​{bb​,

oo​,

ss​}



C.

​{},
​{bb​},

​{oo​},

​{ss​},

​{bb​,

oo​},

​{bb​,

ss​},

​{oo​,

ss​}



D.

​{},
​{bb​,

oo​},

​{bb​,

ss​},

​{oo​,

bb​},

​{oo​,

ss​},

​{ss​,

bb​},

​{ss​,

oo​},

​{bb​,

oo​,

ss​}


​b) Choose the correct answer below.






A.


​{bb​,

oo​,

ss​}



B.


​{bb​},

​{oo​},

​{ss​}



C.

​{ },
​{bb​,

oo​,

ss​}



D.

​{ }