For any non-zero a and b that satisfy |ab| = ab and |a| = a
|b - 4| + |ab - b| = ?	Select the correct option
A) ab - 4	B) 2 b - ab - 4	C) ab + 4	D) ab - 2 b + 4	E) 4 - ab

Rationale: | ab | = ab and | a | = - a = > b is also negative . so | b - 4 | + | ab - b | = ( b - 4 ) + ab - b ( as ab is positive and - b is positive , so expression is totally positive ) = b - 4 + ab - b = ab - 4 answer - a
Answer: A