The correct answer is:
An open door policy of management
and
Reading and acting on e-mails as they are received
Rationale: An assertive style of communication will help in time management, because it enables you to say 'no' (appropriately) to interruptions and unscheduled demands. An unsociable work group will clearly not be gossiping!
The other options are problems: 'an open door policy of management' is an invitation to waste time in non-essential communication.
'Reading and acting on e-mails as they are received' may look organised and decisive - but e-mails arrive so frequently, they would de-rail your entire schedule if you let them: better to batch them and deal with them at certain times.
