Which statement best defines the solution set of a system of linear inequalities?

The set of all points that satisfy every inequality in the system, represented by the overlap of shaded regions.

The unique intersection point of the boundary lines when at least two lines cross at a single coordinate.

The set of points that make at least one of the inequalities true, shown by any shaded area from any inequality.

Any points on the boundary lines regardless of shading, because boundaries are always solutions for inequalities.