Correct Answer & Explanation
Option C
• The question asks for a word that describes failure to meet an obligation.
• 'Compliance' means the act of conforming or yielding.
• 'Fulfillment' means the achievement of something desired, promised, or predicted.
• 'Default' specifically means failure to fulfill an obligation, especially to repay a loan or appear in a court of law.
• 'Adherence' means attachment or commitment to a person, cause, or belief.
• Therefore, 'default' is the most appropriate word for failing to meet an obligation.