A manager keeps a strict open door policy but finds that colleagues stop by frequently throughout the day to discuss non$-$work matters. How should the manager handle this to save time that is important to completing urgent and important tasks during business hours?

a$.$ make time for colleagues during non$-$work time

b$.$ be prepared to respond to colleagues for as long as needed

c$.$ attend to them as the manager has spare time

d$.$ explain that they are busy and cannot take time to talk