Which of the following is a difference between the formal communication network and the informal communication network?

a$.$ The formal communication network is dictated by the cultural environment of an organization, whereas the informal communication network is dictated by the technical environment of an organization.

b$.$ The formal communication network has no single, consistent source, whereas the informal communication network has a single, consistent source.

c$.$ The formal communication network has a reputation for being speedy but inaccurate, whereas the informal communication network is always accurate.

d$.$ The formal communication network can be depicted graphically by the organizational chart, whereas the informal communication network cannot be depicted accurately by any graphic means.