Access Hierarchical DB creation

We need a hierarchical check-box based database where each record (an user) gets to select what geographical regions they are interested in visiting for tourism. e.g., At the top-most layer, the user gets to check off the 6 continents (e.g., Asia, America, Africa, Europe, Australia, Antartica). Then based on their choices here (e.g., say Asia and America are selected), the user is presented with the countries within their choices. Then once countries are chosen, then states and then cities and so on. Key requirements are: a) The names of continents/countries etc., should be flexible and should be read in from an external file. Ideally it should be sufficient to be able to provide a csv file with each node depicted with a "parent" node and a list of "children" nodes. e.g., a country would have a parent node of a continent and its "children" nodes would be the states of that country. b) The user should have the ability to not select or de-select a particular choice. So each one has 3 choices (Yes/No/Dont-Care). If a node is selected to be a "No/Dont-care", all the children and descendents are automatically a "No/Don'tCare". If a user selects "Yes" for a node, then the children nodes need to be presented for a Yes/No/Dont-care choice c) The choice of database, whether mySQL or MSAccess is upto the designer. The tables should retain the hierarchical nature of the selections and not be flat. d) The UI is not super important -- a simple check-box based system is fine. e) Turnaround time is critical -- we are looking to finish this ASAP... f) A simple proof of concept with say 2-continents, 2 nations in each continent, 2 cities in each nation is a good starting point to see. Please describe how your will architect the problem, your turn around time (this is very important)...We intend to move quickly on this.