Our team’s success was ________ the efforts of Mr. Mark, who is ________ arrive here in ten minutes.

A．because; due to

B．because of; about to

C．due to; due to

D．as a result; going to

利用放射性核素标记变性红细胞进行脾脏显像主要是利用脾脏的哪一生理功能（）

A.造血功能

B.免疫功能

C.血细胞阻留功能

D.血液过滤功能

E.吞噬功能