Thanks for the question! So let’s take a look at what’s going on in this question. Let’s say we put Q in group 1 and S in group 3. Well, those are two of the four adults that we’ve placed. Let’s look at the other two adults, R and T. We know that T can’t be placed in group 2 (based on the last rule). We also know there has to be at least one adult in each group; that means R is going to be in group 2, and T is going to be in either groups 1 or 3.
So which of the answer choices cannot be true given what we’ve deduced so far? Well, we know that each of the canoes has 3 people in it. And we know that R is the only adult in the 2nd canoe, since S and Q are in other canoes, and T can’t be in the second canoe. So that means the 2nd canoe has to have two more children to fill up the last two slots. That means it’s impossible for the second canoe to have exactly one child, and that’s why (D) is the correct answer.
Hope this helps! Feel free to ask any other questions that you might have.
