1.Joe was at the window. "There go the three Lang girls," he said. "They all look the same to me, always in red or blue." "Eve, Ann and Carol. Nice kids, but they do have a thing about those two colours," Susan told him. "Ann wears blue if, and only if, Eve is in red, and you never see Carol and Eve both in blue. That's Carol or Ann in the red mini, but they wouldn't both wear red." Which of the girls would be in blue that day?

Only Ann wore blue

Only Eve wore blue

Only Carol wore blue