Tom has a collection of 13 snakes, 4 of which are purple and 5 of which are happy. He observes that
\bullet all of his happy snakes can add,
\bullet none of his purple snakes can subtract, and
\bullet all of his snakes that cant subtract also cant add.
Which of these conclusions can be drawn about Toms snakes?
Answer Choices
A. Purple snakes can add.
B. Purple snakes are happy.
C. Snakes that can add are purple.
D. Happy snakes are not purple.
E. Happy snakes can’t subtract.