The platform business model involves,

a$)$ profiting from a platform that allows two or more groups of users to interact.

b$)$ the emergence of digital technology has "turbocharged" the model, although it is by no means a sure path to success.

c$)$ platform economy which is the preferable term for discussing several aspects of emergent digital phenomena in the early $21$ st century.

d$)$ Both a and b

e$)$ None of above