Spencer's blog claims that national parks are the best vacation destinations. Which evidence is best for developing his claim?

Below are the choices and I think the answer is the first one:

a personal account from a park visitor who describes positive adventures at Grand Canyon and Yellowstone parks

an interview with a travel agent who advertises cruises, eco-tours, and whitewater rafting trips

a chart that compares the number of national parks in the eastern United States to that in the western states

a study that proves adults who take yearly vacations have lower blood pressure than those who do not