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. select one: a. false; the four points do not have to be in a straight line. b. true c. false; two points are always coplanar but four are not. d. false; three points are always coplanar but four are not.