"Some birds are animals. All animals are rivers. Some rivers are lions.."?

I saw a question in the voting section asking how to explain it. here's the original poster's question:

""Some birds are animals. All animals are rivers. Some rivers are lions.." can anyone tell me how to solve this?

Answer is 3rd but I don't know how to solve this :

I. Some lions are animals

II. Some rivers are birds

III. No animal is lion

(1) Only II follows

(2) Only either I or III follows

(3) I and II follows

(4) only either II or III follow

(5) None of these

Ans: 3"

The answer is 3 because you have to look at it backwards. If some rivers are lions, then it can be understood that those same lions are rivers. If all animals are rivers, then those rivers are animals. Since some lions are rivers and some rivers are animals, then some lions are animals.

If some birds are animals, then it is understood that those certain animals are birds. Since some animals are rivers, those rivers can be animals. Since some birds are animals, then the rivers (which are animals) are birds.

There is not enough information to support the statement, "no animal is a lion." The whole riddle was of possibilities, not of what couldn't happen. Therefore, the correct answer is statements I and II because there is enough information to make those assumptions, but not enough information to assume statement III is valid.

Now... the real question (my question).

The only reason why I really wanted to answer that riddle was because I felt I understood the answer, but the answers which were already given didn't seem to cut it. The riddle question was already in voting so I couldn't put my input. Is there a way I can somehow contact the user to explain it to them just so that he understands (I don't need the points)?