If X is false, Y may be ______, e. g. If he has not been to France, he may still have been to Europe or he has not been to Europe.
A、true or false
B、true
C、false
D、true and false
【正确答案】：A
【题目解析】：If X is false, Y may be true or false, e. g. If he has not been to France, he may still have been to Europe or he has not been to Europe.
