What are the four key aspects mentioned by Eduardo Albalá in the book 'Bienvenida Web 3.0' for the emergence of Web 2.0?


a) Creation of collaborative platforms, new organization of information, continuous use of beta state, and multiplatform.
b) Generation of user-generated content, use of tags and search engines, continuous use of beta state, and multiplatform.
c) Creation of collaborative platforms, new organization of information, use of tags and search engines, and multiplatform.