Final answer:
The word with a negative connotation in the sentence is 'shocked'.
Step-by-step explanation:
The word from the sentence that has a negative connotation is shocked. Negative connotations typically evoke feelings of surprise, disappointment, or discomfort. In this sentence, the attendees were shocked by the limited options provided in the complimentary buffet, indicating their dissatisfaction or disappointment. The word 'shocked' carries a negative connotation in this context.