Answer: A. Debtors.
Step-by-step explanation: A pattern is a repetitive model, design or structure that forms a consistent arrangement. In this case we are talking about a spelling pattern, which is the repetition of the same arrangement or order of letters in different words. First, we are giving three words, to identify the pattern we only have to found the common characteristics between then, that is the use of the letters "bt", from the given options, the one that fits in the pattern is "debtors" which also has the combination of letters "bt."