Final answer:
The largest portion of your FICO score is your Payment history, comprising 35% of the total score. This reflects the importance of timely debt payments in the credit scoring process, ensuring lenders make fair credit decisions based on financial behavior, not demographics.
Step-by-step explanation:
The largest portion of your FICO score is A) Payment history. This category makes up 35% of your FICO score and is considered the most critical factor in credit scoring. Lenders want to ensure that you have a history of paying your debts on time. Credit scoring is a fair way to make a credit decision, and decisions are based on credit behavior, not personal characteristics like race, gender, or religion. It's also worth noting that while a bad credit score can result from past mistakes, it does not haunt you forever due to the ability to rebuild credit over time.