Simplfy
3b - [b -(a+b) - {b - (b - a+b)} + 2a]	Choose the correct choice from the following choices.
A) a B) 2b C) 4a D) 0 E) 1
Explanation:   3b-[b-(a+b)-{b-(b-a+b)}+2a]   =3b-[b-a-b-{b-(2b-a)}+2a]   =3b-[-a-{b-2b+a}+2a]   =3b-[-a-{-b+a}+2a]   =3b-[-a+b-a+2a]   =3b-[-2a+b+2a]   =3b-b   =2b   Option 2b
<result>B</result>
Simplfy
3b - [b -(a+b) - {b - (b - a+b)} + 2a]