What does a stop sign mean?

Answer: C — Stop before entering

A stop sign means that you must come to a complete stop before entering the intersection, regardless of whether there are other vehicles or pedestrians present. This is to ensure the safety of all road users and to allow for a smooth flow of traffic. Choosing option A, B, or D would either imply that you are not required to come to a complete stop or that you can continue through the intersection without stopping, both of which are incorrect interpretations of a stop sign. Therefore, option C is the best choice as it accurately reflects the meaning of a stop sign.