We recommend for you to reach out to your local US Embassy to confirm the Visa type to ensure that this information is applicable to your country.
The Visa Wizard on the US Government Travel website may be helpful: http://travel.state.gov/content/visas/en/general/visa-wizard.html
Here are the recommended responses to the 2nd and 3rd questions:
- Why are you traveling to the U.S.?
- Study or Exchange
- What will you be doing in the U.S.?
- I will take a short not-for-credit course or a recreational program