Not all communication is equal or equally effective in all situations. Describe the communication channel that is likely to be most effective and/or efficient in the following situations and explain your choice:

a) The company director wants to announce a new change initiative to her managerial staff that is likely to meet with considerable resistance.

b) In order to initiate an open book policy and ease worries about a rumoured take-over, a manufacturing company wishes to make its financial information updates accessible to all of its employees, from the assembly line to the executive offices.

c) Weekly working schedules have to be made available to members of a large hotel staff.