D because the other route was closed off because the bridge was not functioning. Also the other answers make no sense like A, the library is right by his house so the route wouldn’t be faster. and B yes it is in between but there need to be more information. C we know nothing about Rob and his friend.
Hello. Thank you for uploading an image. The answer is choice D. If you look on the map. Rob’s friend can’t take any other route than the one Rob gave him. Because the school is across a river from Rob’s house. And the there is only one route with a bridge