双下肢对称性紫癜伴荨麻疹者常见于（）

A.过敏性紫癜

B.再生障碍性贫血

C.激素性紫癜

D.血小板减少

E.特发性血小板增多症

__________ experts' opinions,they gave up the experiment immediately.[ ]

A．According to      

B．As a result of

C．Instead of  

D．With the help of