The question of __________ English will keep on changing in the future is easy __________ since it is certain that this process will continue.
A:if; to answer
B:whether; to be answered
C:whether; to answer
D:if; to be answered
由南美各国足球俱乐部冠亚军参加的足球联赛被冠名为“解放者杯”,是为了纪念( )
下列数中能同时被2、3整除的是( )