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

A. February 2
B. February 4
C. February 20
D. February 1