Select the correct answer. a charity's outreach program is working to provide food and medicine to the people affected by a hurricane. the members drive in a truck from their headquarters at a, as shown in the image, to the locations b, c, d, e, f, g, and h and then go back to their office. what is the total length of their drive? a. 20 units b. 30 units c. 40 units d. 50 units