Answer:
"More than half the trails are 4 1/2 kilometers or shorter" is the only right answer
Explanation:
Using the process of elimination, I will help you to cancel out each one and explain why it is wrong.
The first one says four trails are 3 kilometers long. Now in middle school, we all already know how to count up til 10. On the number than says "3" there are 6 dots, meaning 6 trails, not 4, so this is wrong.
The second one says the longest trail is exactly 3 km. This is talking not about how many trails there are, but the actual length, and 6 is larger than 3, so this would also be false.
The third says More than half the trails are 4 1/2 kilometers or shorter. This is right because on that half there are 18 trails, and above 4 1/2 feet has 7.
( 18 > 7 ) so this is right.
And the last is the opposite of the previous one, so by default, only one of the two could be right, and if the third one is right, than this is wrong. But just in case, same equation applies: ( 7 < 18 )
I hope this helps and have a good day!! <33