如果a>b，则下列不等式不成立的是[ ]

A．ac² > bc²　　

B．2a>2b　　

C．-3a <-3b　　

D．a-b>0

---Susan looks very cool with the          .  

---In fact it’s also good for her eyes.[ ]

A.pants

B.jacket

C.hat

D.sunglasses