I believe that their is the correct pronoun for this. Hope this helps:)
I would wager to say its dette
late 13c., dette, from Old French dete, from Latin<span> debitum "thing owed," neuter past participle of debere "to owe," originally, "keep something away from someone," from de- "away" (see de-) + habere "to have" (see habit). Restored spelling after c.1400.</span>debt<span> in Medicine.</span>
Didn’t u answer ur own question ? It says B
I believe b is the correct answer