which one is true about platform economy and platform businesses?

a$)$ the rise of the platform economy has led to a more open economic system with increased social participation and application of intensive internet distributed computing

B$)$ thanks to it the whole business structure is changing dramatically. with the emergence of global interconnected platforms and application of artificial intelligence in business good governance in face of new challenges become ever more pressing

c$)$ unlike platform business model industrial economic model is simple and closed

d$)$ all of the above