A doctor for the Sentovich Family Practice performs a sports physical exam for Liz Hardy on September 1. The charge for the exam is $100; Hardy's insurance company, Cardinal Health, is billed for the entire $100 on September 1. Cardinal Health receives the invoice on September 2, and enters the amount into its payment system on September 4. Sentovich Family Practice receives the $100 payment from Cardinal Health on September 20. On which date would Sentovich Family Practice recognize the revenue for Hardy's physical? A. September 1 B. September 2 C. September 4 D. September 20