The coordinates of the vertices of △rst are r(−3,1), s(−1,4), and t(3,1) .

which statement correctly describes whether △rst is a right triangle?

△rst is a right triangle because rs¯¯ is perpendicular to rt¯¯ .

△rst is a right triangle because rs¯¯ is perpendicular to st¯¯ .

△rst is a right triangle because st¯¯ is perpendicular to rt¯¯.

△rst is not a right triangle because no two of its sides are perpendicular.