单选题Which statement is true about mouse events? （）A The cursor style can be set to CAUTION. B Double-clicking a mouse button can potentially fire six mouse event triggers. C The values for the SYSTEM.MOUSE_BUTTON_PRESSED system variable can only be 1 or 2.
题目
单选题
Which statement is true about mouse events? （）
A
The cursor style can be set to CAUTION.
B
Double-clicking a mouse button can potentially fire six mouse event triggers.
C
The values for the SYSTEM.MOUSE_BUTTON_PRESSED system variable can only be 1 or 2.
D
Click and double-click button actions can only detect if the mouse is positioned in an item.