若主程序通过堆栈向子程序传递了3个参数,子程序返回主程序时,在子程序中清除堆栈中3个参数正确的RET指令是()。
A. RET 3*1
B. RET 3*2
C. RET 3*3
D. RET 3*4
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Given that a scoped attribute cart exists only in a user’s session, which two, taken independently, ensure the scoped attribute cart no longer exists?()
A. ${cart = null}
E. cart
G. ${cart}