The principal that was paid as part of the payment can be found as A. Payment received - finance charge.
Every payment made includes two components which are the principal repayment and the finance charge.
In order to find the principal paid therefore, we can change the subject as shown below:
Payment = Principal + Finance charge
Principal = Payment - Finance charge
In conclusion, option A is correct.
Find out more on credit card payments at https://brainly.com/question/2522722.