The correct answer is "blues, ragtime, dixieland". The 1900s was a decade of great American musical culture transformation. At that time America was mainly rural, in consequence any musical influence was passed by live performances. This is the case of jazz, which even nowadays it is best known for their live performances. Three jazz sytles that emerged during the 1900s were blues, ragtime and dixieland, the last one being essentially a form of ragtime that emerged in New Orleans.