It is           pleasure for us to make a graduate address in           presence of thousands of students in the graduation ceremony.

A．不填; a

B．the; 不填

C．a; the

D．the; the

刘爷爷，武汉某单位退休职员，因病去世。不知其亲属可以获得哪些养老保险补偿？多少钱？