What Is the Main Reason a Company Relies on Implied

What is the main reason a company relies on implied consent instead of explicit consent from a user to process her data?

A) The implied consent model provides the user with more detailed data collection information.
B) To secure explicit consent, a user's website browsing would be significantly disrupted.
C) An explicit consent model is more expensive to implement.
D) Regulators prefer the implied consent model.