Determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points a, b, c, and d conjecture: a, b, c, and d are coplanar. question 16 options: false; the four points do not have to be in a straight line. true false; two points are always coplanar but four are not. false; three points are always coplanar but four are not.