which of the following is an example of signaling? choose all that apply. There is more than one coeect answer.A.Haley uses her 4.0 grade point average to land a new jobB. Tommy's Tea Shop advertises by recording the testimonials of satisfied customers.C. Fred's Used Cars offers a warranty on every car soldD. Jo decides to go to graduate school so her future employer will know that she is smart and a hard worker.