This patient previously received several other treatments before entering this clinical trial, including the drugs carfilzomib, ixazomib, and daratumumab. All three of these drugs have gone through clinical drug development and are now available on the drug market for patient use. Although approved by the US FDA, these drugs will continue to be monitored in phase IV trials to assess their long-term efficacy and safety. Which of the following terms is commonly used to refer to phase IV clinical trials?
A. Post-marketing surveillance
B. Post-marketing monitoring
C. Post-approval surveillance
D. Post-approval monitoring