Correct Answer - C
`B=B cap (A cup B)`
`=B cap (A cup C)" " (therefore A cup B= A cup C)`
`=(B cap A)cup (B cap C ) `
`= (B cap A)cup (B cap C) `
`= ( A cap B )cup (B cap C) `
`(A cap C) cup (B cap C) " " (therefore A cap B = A cap C)`
`=(A cup C) cap C`
`(A cup C)cap C`
=C