Element of the 2010 Arab Spring uprising in Tunisia that best illustrates the
idea of cultural diffusion is
B. Protesters used mass media to learn about and spread democratic political ideals.
Step-by-step explanation:
It was during the Arab spring that social media was first used for the propagation, planning and managing of a social movement which was first taking place in Tunisia against the authoritative and oppressive rule of its government.
Cultural diffusion happens when different cultures are able to share and propagate their ideas with each other in the context of revolution here as the revolution was managed over social media and people formed many movements from this interaction.