Final Answer:
C) Casual because Cool and brief handshakes, often without a smile, denote a casual and relaxed interaction among acquaintances or in informal settings.
Step-by-step explanation:
Cool and brief handshakes without a smile typically denote a casual interaction. This style of handshake is relaxed and less formal, often used among friends, acquaintances, or in informal settings. The absence of a smile and the brevity of the handshake align with the casual nature of the interaction.
In a casual setting, people might engage in quick and effortless handshakes as a gesture of familiarity rather than adhering to formalities. The cool and brief handshake without a smile signifies a laid-back and informal approach to the greeting, emphasizing comfort and ease rather than adherence to strict etiquette or protocol.
Casual handshakes with minimal formality are common among peers, colleagues in relaxed environments, or when meeting acquaintances outside professional or formal settings. The absence of a smile could also suggest a sense of neutrality or the existence of a shared understanding between the individuals regarding the informality of the encounter.