Ihave one more chance on this

which describes the cross section of a square prism that passes through vertices a, b, and c?

a triangle with three equal sides, all measuring 8 inches
a triangle with three equal sides, all longer than 12 inches
a triangle with only two equal sides; one side measures 8 inches, and two sides measure 12 inches
a triangle with only two equal sides; one side is longer than 8 inches and two sides of equal length that are longer than 12 inches