Hello I need help with this question please. And also please give me correct answer and step by step solution. Thank you

Select the best answer for the question. 16.. Harris sells spinach and lettuce and other green healthy plant products and one day he was looking at his accounts and noticed that there was a $20 discrepancy between what was in the register and what the register sales totals were. Where did he see this? O A. Petty Cash Account O B. Cash Over/Short Account O C. Cash Receipts Journal O D. Cash Disbursement Journal