Which of the statements are examples of signaling? Choose all that apply. There is more than one correct ansuer

Jo decides to go to graduate school so her future cmployer will know that she is smart and a hard worker.

Fredis Used Cars offers a warranty on every car sold.

Tommy's Tea Shop advertises by rocording the lestimonlals of satislied customens.

A name brand bleach is priced $45\%$ higher per gallos thas the geseric alternative.

Haley uses her $4\mathrm{.}0$ grade point average to land a new job.