:((( help! please view the image to get a better understanding Part A: Which of the following expressions represents the width of the door?

(3x+6)−x−x

(4x−1)−(3x+6)

(4x−1)−x−x

(3x+6)+(4x−1)+(4x−1)+x+x

Part B: What is the door's width in simplest form? To earn full credit, show your work

Part C: What is an expression that represents the area of the rectangular room? How can the expression be rewritten as a polynomial in standard form? To earn full credit, show your work