During an Emergent Total Open Splenectomy on a Patient with Blunt

During an emergent total open splenectomy on a patient with blunt force trauma to the abdomen,the circulating nurse and anesthesia provider noticed rust-colored urine in the urinary collection container.They had just hung the third unit of whole blood.What nursing action is the first priority?

A) Send a sterile urine sample for stat cytologic studies.
B) Notify the scrubbed team of the urine color change and check the bladder for trauma.
C) Stop the blood transfusion.
D) Check the blood unit for patient-specific identification and expiration date.