单项选择题


【程序】
SET TALK OFF
INPUT “X=” TO X
DO CASE
CASE X>10
“OK1”
CASE X>20
“OK2”
OTHERWISE
“OK3”
ENDCASE
SET TALK ON
RETURN
程序运行时输入X值为100,则显示结果为 ______。

A.“OK1”
B.OK1
C.“OK2”
D.“OK3”