Final answer:
Without specific details on the color and shape, interpretation suggests the sign is related to stopping or yielding. The context hints at a requirement to 'Let cross traffic go by first,' ensuring both vehicle and pedestrian safety.
Correct option is not given.
Step-by-step explanation:
The color and shape of a traffic sign are important cues for road users to understand the rules associated with that sign.
From the context given, though the exact shape and color are not explicitly described, certain hints suggest that we are discussing a traffic situation involving a sign that dictates right-of-way or stop requirements.
Considering standard traffic sign meanings:
Option (a) 'Car on the right goes first' is typically associated with yield signs or uncontrolled intersections where the right-of-way rule applies.
Option (b) 'You have the right of way' could be indicated by a green traffic light or in situations where other signage or signals confer priority to your vehicle.
Option (c) 'Let cross traffic go by first' hints at the requirement to yield or stop for crossing traffic, such as at a stop sign or a red traffic light.
Pedestrian safety concerns mentioned imply the presence of a signal that allows people to cross at safe times.
Hence, the described sign is likely to be a stop sign or traffic signal indicating that drivers must stop and give way to cross traffic and pedestrians.
Without the exact color and shape, the most accurate response would be option (c) 'Let cross traffic go by first' based on the information provided about yielding to other vehicles and pedestrians.
Correct option is not given.