When Assessing a Patient's Vital Signs, a Nurse Understands That

When assessing a patient's vital signs, a nurse understands that an essential principle of vital sign assessment is

A) retaking the vital signs if the first set is not within normal range.
B) comparing a patient's baseline or prior vital signs to the current reading.
C) asking the patient if he or she remembers the last set of vital signs.
D) there is no need to compare current vital signs to previous vital signs.