Simplfy
2b - [b -(a+b) - {b - (b - a+b)} + 2a] Select the correct option
A) a	B) 2a	C) 4a	D) b	E) 1
Explanation:   2b-[b-(a+b)-{b-(b-a+b)}+2a]   =2b-[b-a-b-{b-(2b-a)}+2a]   =2b-[-a-{b-2b+a}+2a]   =2b-[-a-{-b+a}+2a]   =2b-[-a+b-a+2a]   =2b-[-2a+b+2a]   =2b-b   =b   Option b
<result>D</result>
Simplfy
2b - [b -(a+b) - {b - (b - a+b)} + 2a]