You must check the mirrors...
A)only when overtaking.
B)only when performing manoeuvres.
C)regularly while driving.Correct
We must not limit ourselves to only looking ahead; we should check the rear-view mirrors frequently even when not performing any manoeuvre, in order to gather information with enough time to analyse it and react to any unexpected situation.
On urban roads and roads with heavy traffic: every 5-10 seconds.
On roads with no traffic and dual carriageways: every 10-15 seconds.
On urban roads and roads with heavy traffic: every 5-10 seconds.
On roads with no traffic and dual carriageways: every 10-15 seconds.