The answer would most commonly be C only because a square is 360 degrees and the surface area would be a 6th of that which is 60 then i multiplied it by 4 because of the four corners signaling the height and or length of the 2D figure square which gives me C.
This can be solver by creating a small equation with x being the number and solving for x. The equation would be 8 + 2( x + 3 ) = -6 Solve for x: 8 + 2( x + 3 ) = -6 Distribute the 2 8+ (2x+6)=-6 Subtract 8 2x+6= -14 Add 6 2x= 8 Divide by 2 x=4