Answer: A. It brings the library to people who find it hard to come to us.
This is the sentence that provides relevant evidence in support of Joshua's claim. Joshua argues that if the budget is cut, this would eliminate many services that are important to the community, such as the bookmobile. The idea that the bookmobile is important is supported by the fact that people who find it difficult to go to the library can access these book thanks to the bookmobile.