A deck of cards contains a white card and two red cards. Take one card out randomly, record its colour, and put it back in the deck. Then, take another card out randomly.  Compare the probability of the following situations.  I. Both cards are of the same colour.  II. Both cards are red.  III. Two cards are of different colours.  Which one has the highest probability? 
选项为:A:$$I$$  B:$$II$$  C:$$III$$  请回答其中一个选项.