--- Could you please help me with my English?

---________.

A．You’re welcome

B．It’s a pleasure

C．It’s very kind of you

D．That’s a good idea

慢性肾功能不全失代偿期超声表现是（）

①双肾萎缩

②双肾皮质回声增强、变薄、皮髓界限不清，皮质厚度与肾功能呈负相关

③CDFI：高速低阻型血流

④CDFI：低速高阻型血流

⑤RI与肾功损害呈正相关

A.①②④⑤

B.①②③⑤

C.①②

D.①②④