_______ the students and teachers, I wish to extend our warmest welcome to you.[ ]

A. On business  

B. On account of

C. On purpose  

D. On behalf of

arrar和barr两个数组的说明如下：　　var arrar:array[0..7] of char; 　　barr:array[-5..2,3..8] of char; 这两个数组分别能存放的字符的最大个数是

A．7和35

B．1和5

C．8和48

D．1和6