Learning how to drive is no easy task. There are many things we need to be attentive of. Thankfully, one of them we're familiar with since we are pedestrians or children: traffic lights! I should know that if the light turns red, I should stop. If it's yellow, I should be getting ready to stop, and green means I am good to keep going. In CDMX the SSC (Undersecretariat of Traffic Control) is in charge of controlling the traffic lights.

When I am interacting with traffic lights, the SSC is:

Question 3 options:

The receptor

The transmitter

The code

The channel