Following the administration of sublingual nitroglycerin to a client experiencing an acute anginal attack, which assessment finding indicates to the nurse that the desired effect has been achieved?
A. Client states chest pain is relieved
B. Client's pulse decreases from 120 to 90
C. Client's systolic blood pressure decreases from 180 to 90
D. Clients SaO2 level increases from 92% to 96%