The world’s population is getting larger and larger, so scientists will have to ______ new ways to solve food problem.

A．catch up with

B．keep up with

C．come up with

D．make up with

新生儿溶血病换血治疗时，如果确诊为单纯的ABO溶血，该患儿血型为A型Rh阳性，则采用下列哪种搭配为最好（）

A.A型红细胞+AB型血浆

B.O型红细胞+AB型血浆

C.O型红细胞+O型血浆

D.A型红细胞+A型血浆

E.O型红细胞+A型血浆