The easiest one would be the single-entry system
the accounting in single entry system only cover the "bare essentials" in its book such as cash, product, and account payable"
It's really simple and way cheaper to maintain compared to the double-entry system. Which cover all the transactions, even the one one that haven't happen yet
Talking to a doctor to get prescribed medication and or talk to a therapist.
The answer is c hope this helps if that’s not it tell me and I’ll try to figure it out again