When Assessing a Patient's Pulse,the Nurse Notes That the Amplitude

When assessing a patient's pulse,the nurse notes that the amplitude is weaker during inspiration and stronger during expiration.When the nurse measures the blood pressure,the reading decreases by 20 mm Hg during inspiration and increases with expiration.This patient is experiencing:

A) pulsus alternans.
B) pulsus bisferiens.
C) pulsus bigeminus.
D) pulsus paradoxus.