When passing a bus displaying a School sign that has stopped to let children on or off, what should your speed be?

When passing a bus displaying a School sign that has stopped to let children on or off, what should your speed be?undefined
20km/h
50km/h
70km/h
100km/h

When a school bus is picking up or dropping off children, other vehicles must drive at a speed not exceeding 20 kilometers per hour to prevent any children from appearing on the road unexpectedly.