I am a master's degree student and I just got a paper approved for presentation at a conference that will last for a couple of days in the USA. Looking at the US Embassy website I didn't find it clear which visa I should apply for.
At first look, F1, F2, M1 or M2 looks most promising but they don't look like they apply for this exact purpose because they look appropriate for longer periods.
So, which visa should I apply for in that case?