The core concept is the meaning of 'notoriously,' which typically implies something unfavorable or negative. Option C correctly uses 'notoriously' to describe heavy traffic, a generally undesirable condition. Options A, B, and D use 'notoriously' with positive attributes which is incorrect. 'Notoriously' is generally used to denote negative or ill-famed qualities or conditions. The key is to understand 'notoriously' is not used to describe good qualities.