Concept:Alacrity means a brisk, cheerful readiness or enthusiasm to act. Explanation:The word “alacrity” implies eagerness and willingness, not sluggishness or hesitation.“Eagerness” expresses strong desire and keenness, matching the meaning of alacrity.Options like sluggishness, hesitation, and delay all indicate slowness or reluctance, which are opposites.Thus, the correct synonym is eagerness. Answer:C. Eagerness