Read the following context and choose the best option to answer the question.
Context: You 'll pass through security at the visitors entrance and then past the reflecting pool , down the path and around through the trees into the Garden of the Missing . Here , the names of 1,557 missing soldiers have their names carved all around the curved wall . You then walk up through the memorial and out into the cemetery . There are 10 sections , five on each side of the central mall ( there 's a computerized index in the visitors center if you 're looking for a specific grave . ) The site is 172 acres and there there are currently 9,387 graves , each with a Latin Cross or Star of David made from white Lasa marble .
Question: Why is there a computerized index available .
Options: 
- Because there are numerous gravestones .
 - Because the stones are disorganized .
 - Because the gravestones are far apart .
 - Because the stones are hard to find .


Because there are numerous gravestones .