Hey there,
Your correct answer would be <span>.for it is it is a main pillar in the edifice of your real independence, the support of your tranquility at home, your peace abroad, of your safety, of your prosperity, of that very liberty which you so highly prize.”</span>Hope this helps.
~Jurgen
SUFFIX meaning: a letter or a group of letters that is added to the end of a word to change its meaning or to form a different word.
Credit, transaction between two parties in which one (the creditor or lender) supplies money, goods, services, or securities in return for a promised future payment by the other (the debtor or borrower). Such transactions normally include the payment of interest to the lender.
Based on the given sentence above, the correct answer for this would be the third option. Basing on the point of view of the speaker, we can say that it is in the third person in which he/she means of Akiko. Since Akiko is only one, this is considered as singular. Hope this answer helps.