What is the right course of action here?

In the image, there is a stop sign, which indicates that the driver must come to a complete stop at the stop line. This means the correct actions are:

1. Allow the blue car to pass through, as it appears to have the right of way.
2. Stop at the stop line to ensure safety and adherence to traffic rules.

Your selection included an additional option, allowing the red car to pass through, but this is incorrect as it could imply giving right of way when it does not have it. In such scenarios, following the traffic signs and rules is crucial for safe driving. Knowing when to yield and stop prevents accidents and promotes orderly traffic flow.