Alice snd Bob picked the marbles from a bag without looking. The bag contains $2$ blue marbles and $1$ red marble. Each picked $1$ marble only. After each saw the colour of their own marble,  Alice said: "I know the colour of your marble!"  If Alice is telling the truth and she is correct, what is the colour of the marble each one got? 
选项为:A:Alice - Blue, Bob - Blue  B:Alice - Red, Bob - Blue  C:Alice - Blue, Bob - Red  D:Alice - Red, Bob - Red  E:None of the above  请回答其中一个选项.