Mensa IQ test question - lines in squares

I think the answer is

Because I figured that

And thus that

Here's an image to visualize that

I think Bailey M has got the intended answer.

But another answer that works is

Reasoning:

Diagram of this solution:

Of course this answer doesn't use all of the given information. For example, the horizontal line in the top middle tile could be translated upwards and everything would still apply. But the same is true of what appears to be the intended solution. In that solution, it doesn't matter whether two lines in a square cross or don't cross, so long as they start and end so as to connect with the lines in adjacent squares. One could also say that going downwards for row 2 but left-to-right for rows 1 and 3 is a bit arbitrary. Our basis for deciding what we think is the best solution is subjective, or at least would take a lot of definition to be made objective.

answer is

because

I think the answer should be

You're all thinking to hard. This is just a game of Tic Tac Toe. Since it is the turn of X, tiles 1, 4, 5, 6, and 7 would all be correct. I personally would go with 7 because it's a well drawn X.

The answer is...

Because...