The market for social-networking website services is characterized by network externalities because: choose one:
a. the less other people are using the website, the more any one person enjoys it.
b. people are less likely to be hired by an employer if they use social-networking websites.
c. the more other people are using the website, the more any one person enjoys it.
d. the number of other people using the website has no effect on any one person’s enjoyment of it.
e. a person needs a computer network to access a social-networking website.