Correct Answer: Option C

Explanation

Vertical Line x = 3:
This line indicates a constraint on x, specifically that 
x ≤ 3.(behind is shaded)

The line y + 2x = -3 or y = - 2x - 3

This line has a negative slope of -2 and intersects the y-axis at -3. The region below this line corresponds to 
y ≤ − 2x − 3.

Line y = x:

.This line has a slope of 1 and passes through the origin. The region below this line corresponds to y ≤ x

The lines are all thick = strict inequalities.

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