There are three men on a deserted island.
The men on the island are either Red or Blue.

Red people always tell lies.
Blue people always tell the truth.

A ship comes to rescue them and the captain of the ships shoult to the men, "We will only rescue Blue people."

Man A says, "I'm blue and those two are "red".
Man B says something but it was blown away with the wind.
Man C Says, "B said he's Blue. That's true. I'm blue too."

Which of the three men should take if he wants just blue people and why?