today i found a very interesting and difficult intelligence test through the internet by accident.i have done it for quite a long time, but i still failed at last.

it's  a question just as follow:

can you guess who of the following feeds fish? (the subject is in the remark.) it's an Einstein's IQ question, he said that 98%if the world's people can't answer this question, please see if you belong to the other 2%.

A. Norwegian    B.German    C. Danes     D. Swede     E. British

 the conditions are as follow:

 1. there are five houses of five kinds of color

 2. the owner of every house is different nationality

 3. everyone of the 5 persons drinks only one brand of beverage, smokes only one brand of cigarettes, raises only one kind of pets.

 4. No one keeps the same kind of pets, smokes the same brand of cigarettes, or drinks the same drink with others

 Known:

 1. the British lives in the red house;

 2. the Swede keeps a dog;

 3. the Danes drinks tea;

 4. the green house is on the left of the white house;

 5. the owner of the green house drinks coffee;

 6. the person who smokes PALL MALL cigarette raises a bird;

 7. the owner of the yellow house smokes DUNHILL cigarettes;

 8. the owner of the house in the middle drinks the milk;

 9. the Norwegians lives in the first house;

 10. the person who smokes the blends lives by the side of the person who keeps cats;

 11. the person who raises horses live by the side of the person who smokes the DUNHILL cigarettes;

 12. the person who smokes the BLUE MASTER cigarettes drinks beer;

 13. the German smokes PRINCE  cigarettes;

 14.the Norwegians lives next to the blue house;

 15. the neighbor of the person who smokes the blends drinks mineral water.

the correct answer is : C. Danes, but i can't understand why, could anyone who knows the answer tell us? thank you!