变量c中存储着一个字符，能够正确判断出该字符为数字字符”0”~”9”的VB表达式是（   ）

A．c>="0" And c<="9"

B．c>="0" or c<="9"

C．Asc(c)>="0" And Asc(c)<=9

D．Asc(c)>="0" or Asc(c)<=9