What caused Koly to get sick after Mala's party?

Koly's illness after Mala's party is attributed to the possibility that someone put drugs in her drink. This explanation aligns with the narrative, as it highlights the vulnerability Koly faces in the context of the party and the risks associated with consuming beverages in social settings where one may not be fully aware of their surroundings. The presence of drugs would not only account for her sudden sickness but also point to a troubling aspect of her experience at the party, emphasizing themes of safety and trust.

Considering the context, food allergies or being overly tired do not provide a narrative connection to the events at the party, as there was no prior indication of her having allergic reactions or significant fatigue that would suggest she would become ill from those causes. A fight with someone also seems less relevant, as the story revolves around her experiences within a communal celebration rather than any direct confrontation. Thus, the correct answer captures the dangerous implications of her situation and reflects the themes of vulnerability and risk in social environments.