Free wifi is typically offered on an
a) unencrypted
b) encrypted
c) open
d) private

open

Explanation:

Free WiFi is typically offered in an open place ( public place ) as a form of attracting people to the place.some of the reasons public places offer such services like free WiFi is to ensure customer satisfaction and also to encourage customers to stay longer and also return in the future.

A free WiFi is a WiFi network that is not encrypted i.e unencrypted ( no password is required to be connected to it ) most WiFi networks on private spaces/properties are usually not free to avoid unauthorized access/connection to the WiFi

answer; ( blue box );

i think its d if im not mistaken